Publications

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Technical Reports

Natalia M. Markovich, Udo R. Krieger:
Analyzing Measurements from Data with Underlying Dependences and Heavy-tailed Distributions.
In: Proc. 2nd ACM/SPEC Int. Conference on Performance Engineering,March 14-16,  Karlsruhe, Germany, 2011.

Natalia M. Markovich, Udo R. Krieger:
Statistical Analysis and Modeling of Peer-to-Peer Multimedia Traffic.
In: D. Kouvatsos (ed.), Next Generation Internet: Performance Evaluation and Applications,  LNCS 5233, Springer, Heidelberg, 2011.

Udo R. Krieger:
An Algebraic Multigrid Solution of Large Markovian Models Arising in Web Information Retrieval.
In: D. Kouvatsos  (ed.), Next Generation Internet: Performance Evaluation and Applications, LNCS 5233, Springer, Heidelberg,  2011.

P. M. Eittenberger, U.R. Krieger:
Measurement of P2P Streaming Traffic.
In: 28th International Symposium on Computer Performance, Modeling, Measurements and Evaluation (Performance 2010) - Poster Session, Namur, Belgium, November 17-19,2010

Natalia M. Markovich, Udo R. Krieger:
Statistical Analysis and Modeling of Skype VoIP Flows.
In: Computer Communications, vol. 33, 11-21, November 2010.

A. Biernacki, U.R. Krieger:
Session Level Analysis of P2P Television Traces.
In: S. Zeadally et al. (eds.), Proc. 3rd International Workshop on Future Multimedia Networking,  Krakow, June 17-18,  2010.

P. M. Eittenberger, U.R. Krieger, A. Biernacki, N.M. Markovich:
Integrated Measurement and Analysis of Peer-to-Peer Streaming Traffic by the Java Tool Atheris.
In: 10th IEEE International Conference on Peer-to-Peer Computing (P2P 2010) - Demo Session, Delft, August 25-27, 2010.

Udo R. Krieger, Diana Bejenari , Gheorghe Mishkoy:
Matrix Algorithm for Solving Kendall's Equation in Polling Models.
In: Proc. Int. Conference on Information Technologies, Systems and Networks ITSN-2010, Free International University of Moldova Chisinau, Republic of Moldova, 25 – 26 February 2010.

Philipp M. Eittenberger, Udo R. Krieger, Natalia M. Markovich:
Measurement and Analysis of Live-Streamed P2PTV Traffic.
In: 6th International Working Conference on  Performance Modeling and Evaluation of Heterogeneous Networks  (HET-NETs '10), Zakopane, Poland, January 14-16, 2010.

Udo R. Krieger, Tien van Do, Natalia M. Markovich:
Modeling and Analysis of Triple Play Services in Multimedia Internet.
In: T. Czachórski, ed., Performance Modelling and Evaluation of Heterogeneous Networks, Proc. HET-NETs 2010, Zakopane, Poland, January 14-16, 2010.

Natalia M. Markovich, Udo R. Krieger
Statistical Characterization of QoS  Aspects Arising from the Transport of Skype VoIP Flows 
1st International  Conference on Evolving Internet, pp.9-14,  2009

Natalia M. Markovich and Udo. R. Krieger,
Statistical Inspection and Analysis Techniques for Traffic Data Arising from the Internet.
Traffic and Performance Engineering for Heterogeneous Networks, D.D. Kouvatsos (Ed.), ISBN 978-87-92329-16-5, River Publishers Series in Information Science and Technology - Vol. 1, Chapter 2,pp. 41-60, 2009.

Tien Van Do,  Udo R. Krieger
A Performance Model for Maintenance Tasks in an Environment of Virtualized Servers.
in: Networking 2009, 8th International IFIP-TC 6 Networking Conference, Aachen, Germany, May 11-15, 2009, Luigi Fratta, Henning Schulzrinne, Yutaka Takahashi, Otto Spaniol (Eds.), Spirnger, LNCS 5550, Berlin, 2009, pp.  931 - 942

Natalia M. Markovich, Udo R. Krieger
Statistical Analysis of VoIP Flows Generated by Skype Users
In Proc. International Workshop on Traffic Management and Traffic Engineering for the Future Internet (FITraMEn 08), Porto, Portugal, 11-12 December, 2008

Udo R. Krieger.
Book Review: G. Bolch et al., Queuing Networks and Markov Chains, IIE
Transactions, vo. 40, no 5, May 2008.

Udo R. Krieger,  Ronny Schweßinger.
Analysis and Quality Assessment of Peer-to-Peer IPTV Systems,
In Proc. 12th Annual IEEE International Symposium on Consumer Electronics (ISCE2008), April, 14-16th 2008, Algarve, Portugal. 

Udo R. Krieger, ed.
Achievements on Measurements, IP Traffic Characterization, Classification and Statistical Methods
IST-FP6 NoE EuroFGI, Contract No. 028022, Deliverable D--WP-JRA-5.1-2, March 2008, (http://www.eurongi.org)

Udo R. Krieger
An Algebraic Multigrid Solution of Large Hierarchical Markovian Models Arising in Web Information Retrieval,
In. Proc.  Fifth International Working Conference on “Performance Modeling and Evaluation of Heterogeneous Networks” HET‐NETs 2008, February 18 – 20, 2008, Paper K04, Karlskrona, Sweden.

Tien Van Do, Udo R. Krieger,  Ram Chakka.
Performance Modeling of an Apache Web Server with a Dynamic Pool of Service Processes,
Telecommunication Systems, volume 39, issue numbers  2-3, November 2008.

Udo R. Krieger, ed.,
New Mathematical Methods, Algorithms and Tools for Measurements , IP Traffic Characterization, Classification, and Statistical Methods
IST-FP6 NoE EuroFGI, Contract No. 028022, Deliverable D--WP-JRA-5.1-1, December 2007, (http://www.eurongi.org)

Udo Krieger, Tien van Do: 
Performance Modeling of a Streaming Media Server.
Proc. Fourth Euro-FGI Workshop on "New Trends in Modelling, Quantitative Methods and Measurements" (WP IA.7.1), Ghent, Belgium, May 31 - June 1, 2007 (http://telin.ugent.be/EuroFGI/)

Udo Krieger: 
Characterization of Web Services with Advanced Multimedia Components.
IST-FP6 NoE EuroNGI, Specific Research Project WebTC, Deliverable D.WP.JRA.S.20.1, Februar 2007. (http://www.eurongi.org)

Udo Krieger: 
Achievements on IP Traffic Characterization, Measurements and Statistical Methods. 
IST-FP6 NoE EuroNGI, Contract No. 507613, Deliverable D.WP.JRA.5.1.2, Februar 2007. (http://www.eurongi.org)

Udo R. Krieger, Natalia M. Markovich
Statistical Inspection and Analysis Techniques for Traffic : Data Arising from the Internet  (Access to JRA: Contract No. 507613, Deliverable D.WP.JRA.5.1.3, Januar 2006)  http://eurongi.enst.fr/archive/127/DJRA512.pdf

Udo Krieger: Methods, Techniques and Tools for IP Traffic Characterization, Measurements and Statistical Methods. IST-FP6 NoE EuroNGI, Contract No. 507613, Deliverable D.WP.JRA.5.1.2, Januar 2006. (http://www.eurongi.org)

Udo Krieger: Analysis of Internet Data: Objectives and Statistical Methods. Tagungsband BSI-Workshop "IT-Frühwarnsysteme", 12, 07.2006, Bundesamt für Sicherheit in der Informationstechnik, Bonn, 2006.

Tien Van Do,  Ram Chakka, Thang Le Nhat, Udo Krieger: Performance Modeling of a Web Server with a  Dynamic Pool  of Service Processes. Proc. EuroNGI Workshop "Stochastic Performance Models for Resource Allocation in Communication Systems" November 8-10, 2006, CWI, Amsterdam, to appear.

Natalia Markovitch, Udo Krieger: Nonparametric Estimation of the Renewal Function by Empirical Data. Stochastic Models, Volume 22, Number 2/2006 pp. 175-199, Taylor & Francis, 2006.

U. R. Krieger: IP Traffic Characterization, Measurements and Statistical Methods - A Description of the Current State. IST-FP6 NoE EuroNGI, Contract No. 507613, Deliverable D.WP.JRA.5.1.1, April 2005. (http://www.eurongi.org)

L. Breuer, V. I. Klimenok, A. Birukov, A. N. Dudin, U. R. Krieger: Modeling the Access to a Wireless Network at Hot Spots. European Transactions on Telecommunications, 16, pp. 309-316, 2005.

V. I. Klimenok,  A. V. Kazimirsky, A. N. Dudin, L. Breuer, U. R. Krieger: Queueing Model  MAP|PH|1|N with Feedback Operating in the Markovian Random Environment, Austrian Journal of Statistics, Vol.34(2), pp.101-110, 2005.

U. Krieger , V. I. Klimenok, A. V. Kazimirsky, L. Breuer, A. N. Dudin: A BMAP/PH/1 Queue With Feedback Operating in a Random Environment", Mathematical and Computer Modelling, Vol. 41/8-9, pp. 867-882, 2005.

M. Pagano, W. Sandmann: Efficient Rare Event Simulation - A Tutorial on ImportanceSampling. In D. Kouvatsos (ed.): Proceedings of the 3rd International Conference on Performance Modelling and Evaluation of Heterogeneous Networks (HET-NETs '05), T03/1-38, Ilkley, UK, July 18-20, 2005.

W. Sandmann: Importance Sampling in Markovian Settings. In M.E. Kuhl, N.M. Steiger, F.B. Armstrong, J.A. Joines (eds.): Proceedings of the 2005 Winter Simulation Conference (WSC '05), pp. 499-508, Orlando, Florida, USA, 4-7 December, Omnipress, 2005.

W. Sandmann: On Optimal Importance Sampling for Discrete-Time Markov Chains. In G. Balbo (ed.): Proceedings of the 2nd International Conference on Quantitative Evaluation of Systems (QEST), pp. 230-239, Torino, Italy, 19-22 September, IEEE Computer Society Press, 2005.

W. Sandmann: A Discrimination Frequency Based Queueing Fairness Measure with Regard to Job Seniority and Service Requirement. In R. Sabella (ed.): Proceedings of the 1st Euro NGI Conference on Next Generation Internet Networks - Traffic Engineering (NGI2005), pp. 106-113, Rome, Italy, 18-20 April, IEEE Computer Society Press, 2005.

N.M. Markovitch, U.R. Krieger: Statistical Inspection and Analysis Techniques for Traffic Data Arising from the Internet. In D. Kouvatsos (ed.): Proceedings of the 2nd International Working Conference on Performance Modelling and Evaluation of Heterogeneous Networks (HET-NETs '04), P72/1-9, Ilkley, UK, July 26-28, 2004.

W. Sandmann: Fast Simulation of Excessive Population Size in Tandem Jackson Networks. In D. DeGroot, P. Harrison (eds.): Proceedings of the 12th Annual IEEE Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS 2004), pp. 347-354, Volendam, The Netherlands, October 4-8, IEEE Computer Society Press, 2004.

W. Sandmann: State-independent Importance Sampling for Markovian Tandem Queues. Proceedings of the 5th International Workshop on Rare Event Simulation and related Combinatorial Optimization Problems (RESIM/COP 2004), Budapest, Hungary, September 7-8, 2004.

W. Sandmann: Structured Description of Markovian Network Models and its Potentials for Efficient Rare Event Simulation. In D. Kouvatsos (ed.): Proceedings of the 2nd International Conference on Performance Modelling and Evaluation of Heterogeneous Networks (HET-NETs '04), P39/1-10, Ilkley, UK, July 26-28, 2004.

W. Sandmann: Relative Error and Asymptotic Optimality in Estimating Rare Event Probabilities by Importance Sampling. In S. Brailsford, L. Oakshott, S. Robinson, S. Taylor (eds.): Proceedings of the 2004 OR Society Simulation Workshop (SW04) held in cooperation with the ACM SIGSIM, pp. 49-57, Birmingham, UK, March 23-24, 2004.

U. R. Krieger, V. I. Klimenok, L. Breuer, A. N. Dudin: The BMAP|G|1 Queue with Feedback Operating in Synchronous Random Environment as a Model for a Telecommunication Channel with Performance Fluctuation. Erschienen in Proc. Distributed Computer and Communication Networks, DCCN `03, Moscow, Juli 2003.

U. R. Krieger, M. Savoric: Performance Evaluation of ABR Flow-Control Protocols in a Wireless ATM Network. Wireless Networks, 9(1), 73-84, 2003. 

D. Prokopp, M. Matthes, O. Drobnik, U. R. Krieger: Integration of Mobility-, QoS- and CAC-Management for Adaptive Mobile Applications. In W. Burakowski et al., eds., Architecture for Quality of Service in the Internet, Proc. Art-QoS 2003, Warsaw, März 2003; erschienen in LNCS, Springer, Heidelberg, 2003.

W. Sandmann, A. Varga, K. M. Masslow: Generating Random Numbers in OMNeT++. 3rd International OMNeT++ Workshop, Budapest, Hungary, January 27-28, 2003.

N. Markovitch, U. R. Krieger: Statistical Characterization of Mobile User Behavior and its Application to Resource Management in Next Generation Networks. In Proc. IEEE MASCOTS 2002, Workshop on Design and Performance Evaluation of 3G Internet Technologies 2002, Fort Worth, Texas, Oktober 2002.

N. Markovitch, U. R. Krieger: The Estimation of Heavy-tailed Distributions, their Mixtures and Quantiles. Computer Networks, 40(3), 459-474, Oktober 2002.

M. Matthes, J. Bachmann, O. Drobnik, U. R. Krieger: A QoS Management System for Adaptive Applications Supporting Mobility and End-to-End Guarantees. In Proc. IASTED Conf. on Wireless and Optical Communications (WOC) 2002, Banff, Juli 2002.

U. R. Krieger: Die Weiterentwicklung von WLANs zu drahtlosen IP-Netzen mit Mobilitätsmanagement und Dienstgüte-Unterstützung. In Proc. Euroforum-Jahrestagung Wireless Connectivity, Bonn, Mai 2002.

N. Markovitch, U. R. Krieger: Estimating Basic Characteristics of Srrival Processes in Telecommunication Networks by Empirical Data. Telecommunication Systems, 20:1,2, 11-31, 2002.

J. Bachmann, M. Matthes, O. Drobnik, U. R. Krieger: Mobility and QoS-Management for Adaptive Applications. In Proc. 11th World Wide Web Conference, Hawai, Mai 2002.

J. Bachmann, M. Matthes, O. Drobnik, U. R. Krieger: Mobility Management and QoS-Support for Adaptive Applications in Next Generation Wireless Networks: Concept, Realization and Traffic Measurements.
In Proc. Telecommunication Networks and Teletraffic Theory, St. Petersburg, Januar 2002.

N. Markovitch, U. R. Krieger: Non-parametric Heavy-tailed Density Estimation and Classification Problem. In Proc. ALSCOP 2001, IFAC Workshop on Adaptation and Learning in Control and Signal Processing, Cernobbio-Como, August 2001.

N. Markovitch, U. R. Krieger: The Estimation of Heavy-tailed Probability Density Functions and their Mixtures.
In J. Moreira de Souza et al., eds., Teletraffic Engineering in the Internet Era, Teletraffic Science and Engineering, vol. 4, pp. 1113-1126, Elsevier, Amsterdam, 2001.

M. Matthes, O. Drobnik, U. R. Krieger: On the Efficiency of the Data Transport in an IEEE802.11 Wireless LAN with Mobile IP - Myth and Reality. In Proc. Mobile Systems 2001/Mobile Internet, Vol. II, pp. 14-24, Moscow, 27-29 März 2001.

M. Matthes, O. Drobnik, U. R. Krieger: Auswirkung drahtloser Netzsegmente auf die Transporteffizienz von TCP/IP-Verbindungen. In U. Killat, W. Lamersdorf, eds., Proc. Kommunikation in Verteilten Systemen 2001, Springer, Heidelberg, 2001.

U. R. Krieger et al.: Analysis of World Wide Web Traffic by Nonparametric Estimation Techniques.
In K. Guto et al., eds., Performance and QoS of Next Generation Networking, 67-83, Springer, London, 2001.

N. Markovitch, U. R. Krieger: Estimation of the Renewal Function by Empirical Data - A Bayesian Approach. In IEEE Europ. Conf. Universal Multiservice Networks, Oktober 2000.

W. Sandmann: Application of Importance Sampling to Transition Class Models with Rare Events. Proceedings of the 3rd Workshop on Rare Event Simulation (RESIM 2000), Pisa, Italy, October 5-6, 2000. 

N. Markovitch, U. R. Krieger: Nonparametric Estimation of Heavy-Tailed Density Functions and its Application to the Analysis of World Wide Web Traffic. Performance Evaluation, vol. 42, no. 2-3, 205-222, 2000.

M. Savoric, A. Wolisz, U. R. Krieger: The Impact of Handover Protocols on the Performance of ABR Flow-control Algorithms in a Wireless ATM Network. European Trans. on Telecommunications, vol. 11, no. 4, 419-430, 2000.

M. Fiedler, U. R. Krieger: The Impact of Varying Channel Capacity on the Quality of Advanced Data Services in PCS Networks. In Proc. ITC Konferenz Mobile Systeme und Mobilität, Lillehammer, März 2000.

M. Savoric, U. R. Krieger: The Performance of a Fuzzy Flow-control Scheme for WWW Data Transfer in a Wireless ATM Network. In Proc. ITC Konferenz Mobile Systeme und Mobilität, Lillehammer, März 2000.

W. Burakowski, U. R. Krieger et al.: An Overview of Activities on Wireless Networks in the European Project COST 257. In J. Wozniak, J. Konorski, eds., Personal Wireless Communications, 169-197, Kluwer, Boston, 2000.

N. Markovitch, U. R. Krieger: Estimating Basic Characteristics of Arrival Processes in Advanced Packet-switched Networks by Empirical Data. In Proc. IEEE Internet Technology and Services, Moscow, November, 1999.

M. Savoric, U. R. Krieger: Adaptation of the Fuzzy Explicit Rate Marking to ABR Flow-control in a Wireless ATM Network. In Proc. Messung, Modellierung und Bewertung von Rechensystemen, Trier 1999.

U. R. Krieger, V. Naumov: Analysis of a Versatile Queueing Model with State-dependent Service Times. In Proc. Messung, Modellierung und Bewertung von Rechensystemen, Trier 1999.

U. R. Krieger, V. Naumov: Analysis of a Delay-loss System with a Superimposed Markovian Arrival Process and State-dependent Service Times. In W. Stewart et al., eds., Numerical Solution of Markov Chains, Zaragozza, 1999.

U. R. Krieger: Numerical Solution Methods for Markov Chains - The State of the Art. In Proc. European Simulation Multiconference `99, Warsaw, Juni 1999.

U. R. Krieger: The Impact of Segmentation and Correlated Errors on the Performance of a Go-back-N ARQ Protocol. In Proc. European Simulation Multiconference `99, Warsaw, Juni 1999.

U. R. Krieger, M. Savoric: Performance Evaluation of Handover Protocols for Data Communication in a Wireless ATM Network.
In P. Key, D. Smith, eds., Teletraffic Engineering in a Competitive World, Proc. ITC 99, pp. 1261- 1270, Elsevier, North-Holland, 1999.

D. Wagner, U. R. Krieger: Analysis of a Finite Buffer with Non-Preemptive Priority Scheduling. Stochastic Models, vol. 15, no. 2, 1999.

U. R. Krieger, M. Savoric: Performance Evaluation of ABR Flow-control Protocols in a Wireless ATM Network. In Proc. Mobicom/Wowmom 98, USA, Oktober 1998.

M. Savoric, U. R. Krieger: The Impact of Handover Protocols on the Performance of ABR Services in Wireless ATM Networks. In Proc. ITC Seminar, St. Petersburg, Juni 1998.

U. R. Krieger, V. Naoumov, D. Wagner: Analysis of a Versatile Multi-class Delay-loss System with a Superimposed Markovian Arrival Process. European Journal of Operational Research, vol. 108/2, Juli 1998.

U. R. Krieger, V. Naoumov, D. Wagner: Analysis of a Finite FIFO buffer in an Advanced Packet-switched Network. IEICE Trans. Commun., vol. E81-B, No. 5, 937-947, May 1998.

V. Naoumov, U. R. Krieger, D. Wagner: Analysis of a Multi-Server Delay-Loss System with a General Markovian Arrival Process. S. Chakravarthy and A. S. Alfa, eds., Matrix-analytic Methods in Stochastic Models, Marcel Dekker, 1996.

S. Brück, U. R. Krieger: Analysis of Dynamic Routing Strategies by Reduced-load Modeling Applying Newton's Method. In Proc. Regional ITC Seminar, Pretoria, Südafrika, 1995.

U. R. Krieger: On a Two-level Multigrid Solution Method for Finite Markov Chains. Linear Algebra and its Applications, 223/224, 415-438, 1995.

U. R. Krieger: Numerical Solution of Large Finite Markov Chains by Algebraic Multigrid Techniques. In W. Stewart, ed., Numerical solution of Markov chains, Kluwer Publishers, 1995.

U. R. Krieger: Numerical Solution Methods for Large Finite Markov Chains. In R. Marie, G. Haring, G. Kotsis, eds., Performance and Reliability Evaluation, R. Oldenbourg, Wien 1994, pp. 267 -318.

U. R. Krieger, W. Helm: A Decentralized Approach to Adaptive Routing and Congestion Control in Digital Networks. In Proc. ITC Seminar, St. Petersburg, Juni 1992.

W. Liu, U. R. Krieger, I. Akyildiz: An Admission Control Model through Outband Signalling Management. In Proc. IEEE INFOCOM `92, Florenz, Mai 1992.

U. R. Krieger, D. Wagner: Analysis and Application of an MMPP/PH/n/m Multi-server Model. In T. Hasegawa et al., eds., Performance of Distributed Systems and Integrated Communication Networks, IFIP Transactions C-5, pp. 323-342, North-Holland, Amsterdam, 1992.

U. R. Krieger, M. Sczittnick: Application of Numerical Solution Methods for Singular Systems in the Field of Computational Probability Theory. In R. Beauwens und P. de Groen, eds., Iterative Methods in Linear Algebra, pp. 613-626, North-Holland, Amsterdam, 1992.

U. R. Krieger, M. Sczittnick: A Markovian Approach for Modelling and Analysis of Advanced Telecommunication Networks. In A. Jensen, ed., Proceedings ITC 13, Kopenhagen, Juni 1991.

U. R. Krieger: Analysis of a Loss System with Mutual Overflow in a Markovian Environment. In W. Stewart, Numerical Solution of Markov Chains, pp. 303 - 328, Marcel Dekker, New York, 1990.

U. R. Krieger, B. Müller-Clostermann, M. Sczittnick: Modeling and Analysis of Communication Systems Based on Computational Methods for Markov Chains. IEEE Journal on Selected Areas in Communication, Vol. 8, No. 9, 1630 - 1648, 1990.

U. R. Krieger: Analysis of a Loss System with Mutual Overflow and External Traffic. ITG-Fachbericht 107, Stochastische Modelle und Methoden in der Informationstechnik, VDE-Verlag, Berlin, 1989.

U. R. Krieger: Analysis of a Loss System with Mutual Overflow.
In Proc. ITC-Seminar, Peking, September 1988.  

R. Kröger, H. Machens, C. Strelen, K. M. Masslow, W. Sandmann: PROFInet Simulator - Software zur Simulation von PROFInet-Netzwerken. Technischer Bericht, FH Wiesbaden, 2003.

U. Krieger, M. Sczittnick, C. Wysocki: MACOM Examples. Technischer Bericht, Lehrstuhl Informatik IV, Universität Dortmund, September 1997.

U. Krieger: Numerical Solution Methods for Markovian Chains. Technischer Bericht 4302 TB 16 E, Telekom AG, Januar 1996.

 J. Grabmeier, K. Huber, U. Krieger: Das Computeralgebrasystem AXIOM bei kryptologischen und bei verkehrstheoretischen Untersuchungen des Forschungsinstituts der Deutschen Bundespost TELEKOM. IBM Forschungsbericht TR 75.91.20, IBM Wiss. Zentrum Heidelberg, August 1991.

U. Krieger und D. Wagner: Analysis of an MMPP/PH/n/m Multi-server Model and its Application in B-ISDN Modelling. Technischer Bericht 4302 TB 11 E, FI der DBP, 1990.

W. Liu, U. Krieger und I. F. Akyildiz: A Generic Model on Congestion Control through Outband Signaling. Technical Report GIT-ICS-90-60, College of Computing, Georgia Institute of Technology, Atlanta, GA 30332, USA, November 1990.

B. Müller-Clostermann, M. Sczittnick, U. Krieger: Modelling and Analysis of Modern Telecommunication Networks by Markovian Techniques: Foundations, Algorithms and Examples. Forschungsbericht Nr. 341, FB Informatik, Universität Dortmund, 1990.

 U. Krieger: Computational Methods for Markovian Queueing Models. Technischer Bericht 4302 TB 10 E, FI der DBP, März 1989.

U. Krieger: Analysis of a Loss System with Mutual Overflow. Technischer Bericht 4302 TB 9 E, FI der DBP, August 1988.