%0 Journal Article %A V. V. Kaiser %T Gaussian and mean curvature of two-dimensional subgroups of three-dimensional Lie groups %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1984 %P 68-71 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1984_3_a11/ %G ru %F IVM_1984_3_a11