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@article{MZM_1980_27_3_a15, author = {P. E. Markov}, title = {Infinitesimally small deformations of certain multidimensional surfaces}, journal = {Matemati\v{c}eskie zametki}, pages = {469--479}, publisher = {mathdoc}, volume = {27}, number = {3}, year = {1980}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1980_27_3_a15/} }
P. E. Markov. Infinitesimally small deformations of certain multidimensional surfaces. Matematičeskie zametki, Tome 27 (1980) no. 3, pp. 469-479. http://geodesic.mathdoc.fr/item/MZM_1980_27_3_a15/