%0 Journal Article %A D. P. Zeragiâ %T Existence of a bifurcation point for a class of nonlinear operators %J Doklady Akademii Nauk %D 1992 %P 19-21 %V 326 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1992_326_1_a2/ %G ru %F DAN_1992_326_1_a2