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@article{IVM_1960_1_a7, author = {A. L. Verner}, title = {The extrinsic curvature of convex surfaces in spaces of constant curvature}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {58--68}, publisher = {mathdoc}, number = {1}, year = {1960}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1960_1_a7/} }
A. L. Verner. The extrinsic curvature of convex surfaces in spaces of constant curvature. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 1 (1960), pp. 58-68. http://geodesic.mathdoc.fr/item/IVM_1960_1_a7/