%0 Journal Article %A K. B. Sabitov %T Extremal properties of solutions of a class of parabolic systems and their applications %J Differencialʹnye uravneniâ %D 1990 %P 287-297 %V 26 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1990_26_2_a13/ %G ru %F DE_1990_26_2_a13