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@article{DAN_1973_208_1_a5, author = {N. V. Efimov and Z. D. Usmanov}, title = {Infinitesimal bending of a surface with a point of flatness}, journal = {Doklady Akademii Nauk}, pages = {28--31}, publisher = {mathdoc}, volume = {208}, number = {1}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1973_208_1_a5/} }
N. V. Efimov; Z. D. Usmanov. Infinitesimal bending of a surface with a point of flatness. Doklady Akademii Nauk, Tome 208 (1973) no. 1, pp. 28-31. http://geodesic.mathdoc.fr/item/DAN_1973_208_1_a5/