1. Cinlar, E.,Introduction to stochastic processes, Prentice-Hall, Englewood, Cliffs,NJ.(1975).
2. Gani, J. and Sauders, I.W.,On the parity of individuals in a branching processes, J.Appl.Prob.,13, (1976), 192–230.
3. Godfrey, K.,Compartmental models and their applications, Academic Press, New York,(1983).
4. Jacquez, J.A.,Compartmental analysis in biology and medicine, 2 ed., University of Michigan Press, Ann Arbor, MI.(1985).
5. Kendall, D.G.,Birth and death processes and the theory of Carcinogenesis, Biometrika,47, (1960), 13–21.