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@article{DAN_1957_114_6_a9, author = {V. M. Tsodyks}, title = {On sets of points where the derivative is finite or infinite correspondingly}, journal = {Doklady Akademii Nauk}, pages = {1174--1176}, publisher = {mathdoc}, volume = {114}, number = {6}, year = {1957}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1957_114_6_a9/} }
V. M. Tsodyks. On sets of points where the derivative is finite or infinite correspondingly. Doklady Akademii Nauk, Tome 114 (1957) no. 6, pp. 1174-1176. http://geodesic.mathdoc.fr/item/DAN_1957_114_6_a9/