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@article{IVM_1980_4_a6, author = {V. S. Kim}, title = {The differential geometry of smooth nonregular {surfaces.~II}}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {32--38}, publisher = {mathdoc}, number = {4}, year = {1980}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1980_4_a6/} }
V. S. Kim. The differential geometry of smooth nonregular surfaces.~II. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 4 (1980), pp. 32-38. http://geodesic.mathdoc.fr/item/IVM_1980_4_a6/