%0 Journal Article %A M. Kh. Shkhanukov %T Some boundary value problems for a third-order equation and extremal properties of its solutions %J Differencialʹnye uravneniâ %D 1983 %P 145-152 %V 19 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1983_19_1_a19/ %G ru %F DE_1983_19_1_a19