1. Branching processes;Asmussen,1983
2. Branching Processes;Athreya,1972
3. Functionals of critical multitype branching processes;Athreya;Ann. Probab.,1974
4. Regular Variation;Bingham,1989
5. A method for the proof of limit theorems for branching processes;Borovkov;Teor. Veroyatn. Primen.,1988