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@article{DAN_1990_315_4_a2, author = {Yu. E. Linke}, title = {The problem of the existence of a subdifferential for continuous}, journal = {Doklady Akademii Nauk}, pages = {784--787}, publisher = {mathdoc}, volume = {315}, number = {4}, year = {1990}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1990_315_4_a2/} }
Yu. E. Linke. The problem of the existence of a subdifferential for continuous. Doklady Akademii Nauk, Tome 315 (1990) no. 4, pp. 784-787. http://geodesic.mathdoc.fr/item/DAN_1990_315_4_a2/