%0 Journal Article %A N. G. Kruzhilin %T Two-dimensional spheres in the boundaries of strictly pseudoconvex domains in $\mathbf C^2$ %J Izvestiya. Mathematics %D 1992 %P 1151-1187 %V 39 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_1992_39_3_a3/ %G en %F IM2_1992_39_3_a3