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@article{DAN_1960_134_6_a3, author = {K. K. Golovkin}, title = {Conditions for the smoothness of functions}, journal = {Doklady Akademii Nauk}, pages = {1283--1286}, publisher = {mathdoc}, volume = {134}, number = {6}, year = {1960}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1960_134_6_a3/} }
K. K. Golovkin. Conditions for the smoothness of functions. Doklady Akademii Nauk, Tome 134 (1960) no. 6, pp. 1283-1286. http://geodesic.mathdoc.fr/item/DAN_1960_134_6_a3/