[1] A. Cumani, On the canonical representation of homogeneous Markov processes modelling failure-time distributions, Microelectronics and Reliability, vol. 22, pp. 583602, 1982.
[2] A. Bobbio and A. Cumani. Modelling wear-out by multistate homogeneous Markov processes. In E. Lauger and J. Moltoft, editors, Reliability in Electrical and Electronic Components and Systems (Proceedings EUROCON 82), pages 101-106, North-Holland, 1982.
[3] A. Bobbio and A. Cumani. Modelling wear-out by multistate homogeneous Markov processes. Discrete state stochastic systems with phase type distributed transition times. In Proceedings AMSE International Conference on Modelling and Simulation, Vol. 1.1, pages 173-192, Athens, 1984.
[4] A. Cumani, Esp - A package for the evaluation of stochastic Petri nets with phase-type distributed transition times , in Proceedings International Workshop Timed Petri Nets. Torino
(Italy): IEEE Computer Society Press no. 674, 1985, pp. 144151.
[5] M. Ajmone Marsan, G. Balbo, A. Bobbio, G. Chiola, G. Conte, and A. Cumani, The effect of execution policies on the semantics and analysis of stochastic Petri nets, IEEE Transactions on Software Engineering, vol. SE-15, pp. 832846, 1989.
[6] A. Bobbio and M. Telek. Non-exponential stochastic Petri nets: An overview of methods and techniques.Computer Systems: Science & Engineering, 13:6, 339-351, 1998.
[7] D. Aldous and L. Shepp, The least variable phase type distribution is Erlang, Stochastic
Models, vol. 3, pp. 467473, 1987.
[8] A. Bobbio, A. Horvΰth, M. Scarpa and M. Telek. Acyclic Discrete Phase Type Distributions: Properties and a Parameter Estimation Algorithm. Performance Evaluation, 4:1-32, 2003.