%0 Journal Article %A B. A. Sevast'yanov %T Extinction Conditions for Branching Stochastic Processes with Diffusion %J Teoriâ veroâtnostej i ee primeneniâ %D 1961 %P 276-286 %V 6 %N 3 %U http://geodesic.mathdoc.fr/item/TVP_1961_6_3_a1/ %G ru %F TVP_1961_6_3_a1