%0 Journal Article %A N. M. Yanev %A K. V. Mitov %T The life-periods of critical branching processes with random migration %J Teoriâ veroâtnostej i ee primeneniâ %D 1983 %P 458-467 %V 28 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/TVP_1983_28_3_a1/ %G ru %F TVP_1983_28_3_a1