TY - JOUR AU - V. V. Kaiser TI - Gaussian and mean curvature of two-dimensional subgroups of three-dimensional Lie groups JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 1984 SP - 68 EP - 71 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_1984_3_a11/ LA - ru ID - IVM_1984_3_a11 ER -