%0 Journal Article %A B. V. Bazalii %A I. I. Danilyuk %A I. V. Skrypnik %T Conference on Nonlinear Problems of Mathematical Physics %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1984 %V 39 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1984_39_2_a48/ %G ru %F RM_1984_39_2_a48