1. On phase type distributions in survival analysis;Aalen O. O.;Scand. J. Statist,1995
2. A parametric estimation procedure for relapse time distributions;Åhlström L.;Lifetime Data Analysis,1994
3. The least variable phase type distribution is erlang
4. Exponential families generated by phase‐type distributions and other Markov lifetimes;Asmussen S.;Scand. J. Statist,1989
5. Phase-Type Representations in Random Walk and Queueing Problems