%0 Journal Article %A P. E. Sobolevskii %T Local and nonlocal existence theorems for nonlinear second-order parabolic equations %J Doklady Akademii Nauk %D 1961 %P 292-295 %V 136 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1961_136_2_a8/ %G ru %F DAN_1961_136_2_a8