%0 Journal Article %A V. A. Malyshev %T Classification of two-dimensional positive random walks and almost linear semimartingales %J Doklady Akademii Nauk %D 1972 %P 526-528 %V 202 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1972_202_3_a6/ %G ru %F DAN_1972_202_3_a6