1. K. S. Fahady, M. P. Quine, and D. Vere-Jones, ?Heavy traffic approximation for the Galton-Walton process,? Adv. App. Probab.,3, No. 2, 282?300 (1971).
2. M. Dwass, ?Branching processes in simple random walk,? Proc. Am. Math. Soc.,51, 270?274 (1975).
3. S. V. Nagaev and R. I. Mukhamedkhanova, ?Some limit theorems from the theory of random branching processes,? in: Limit Theorems and Statistical Inference [in Russian], Fan, Tashkent (1966), pp. 83?89.
4. K. A. Borovkov, ?On a method of proving limit theorems for branching processes,? Teor. Veroyatn. Primen.,33, No. 1, 117?123 (1988).
5. J. Lamperti and P. Ney, ?Conditioned branching processes and their limiting diffusions,? Teor. Veroyatn. Primen.,23, No. 1, 126?137 (1968).