%0 Journal Article %A V. Ya. Sikiryavyi %T The solution of boundary value problems connected with an operator of pseudospherical differentiation %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1970 %V 25 %N 6 %U http://geodesic.mathdoc.fr/item/RM_1970_25_6_a15/ %G ru %F RM_1970_25_6_a15