1. Branching processes;Harris;Ann. Math. Statist.,1948
2. Some mathematical models for branching processes;Harris,1951
3. Limiting theorems for Galton-Watson branching process;Levinson;Illinois J. Math.,1959
4. On one-dimensional neutron multiplication;Harris;The Rand Corporation, Research Memorandum RM-2317 (ASTIA No. AD 233143),1960
5. Stochastic Processes;Doob,1953