%0 Journal Article %A Yu. T. Antokhin %T Certain incorrect problems in the theory of partial differential equations %J Differencialʹnye uravneniâ %D 1966 %P 241-251 %V 2 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1966_2_2_a7/ %G ru %F DE_1966_2_2_a7