1. Branching Processes;Athreya,1973
2. The Theory of Branching Processes;Harris,1963
3. Branching processes which perform a random walk;Joffe,1971
4. On sums of independent random variables defined on a binary tree;Joffe;Bol. Soc. Mat. Mexicana,1972
5. A. Joffe and A. R. Moncayo, Asymptotic theorems for sums of independent random variables defined on a tree, Bull. Amer. Math. Soc., to appear.