1. Kobayashi. H 1978. Modeling and Analysis : An introduction to system performance evaluation methodology. Addison Wesley Publishing Company, Reading Massachusetts. ISBN : 0-201-14457-3
2. Konheim, A.G. 1980. Mathematical Models for computer data communication. Case studies in Mathematical Modeling, W.E. Boyce (editor), pp. 256-334. Pitam Advanced Publishing Program, Boston.
3. Konheim. A.G. and Meister, B. 1972. Service in a loop system. Journal of the Association for Computing machinery. Vol. 19, No. 1 (January), pp. 92-108.