%0 Journal Article %A L. N. Fadeeva %T A certain class of nonlinear boundary value problems %J Differencialʹnye uravneniâ %D 1975 %P 1601-1606 %V 11 %N 9 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1975_11_9_a7/ %G ru %F DE_1975_11_9_a7