1. Branching processes;Athreya,1972
2. Convergence of probability measures;Billingsley,1968
3. A course in probability theory;Chung,1974
4. Estimation of the mean and initial probabilities of a branching process;Dion;J. Appl. Prob.,1974
5. Maximum likelihood estimation for stochastic processes — a martingale approach;Feigin,1975