%0 Journal Article %A O. A. Oleinik %T On the smoothness of solutions of degenerating elliptic and parabolic equations %J Doklady Akademii Nauk %D 1965 %P 577-580 %V 163 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1965_163_3_a9/ %G ru %F DAN_1965_163_3_a9