1. Branching Processes;Asmussen,1983
2. Branching Processes;Athreya,1972
3. Regular Variation;Bingham,1987
4. Local limit theorems in the theory of branching processes;Chistyakov;Theory Probab. Appl.,1957
5. An Introduction to Probability Theory and its Applications, Vol. II;Feller,1971