%0 Journal Article %A L. È. Bembiev %T Singularities of~waves of~ surface type %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1988 %P 211-212 %V 43 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1988_43_5_a8/ %G en %F RM_1988_43_5_a8