%0 Journal Article %A V. B. Trushin %T On the solution of some nonlinear equations and variational %J Doklady Akademii Nauk %D 1989 %P 289-292 %V 309 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1989_309_2_a7/ %G ru %F DAN_1989_309_2_a7