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@article{DAN_1976_228_2_a11, author = {S. A. Rakov}, title = {$C$-convexity and the ``problem of there spaces''}, journal = {Doklady Akademii Nauk}, pages = {303--305}, publisher = {mathdoc}, volume = {228}, number = {2}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1976_228_2_a11/} }
S. A. Rakov. $C$-convexity and the ``problem of there spaces''. Doklady Akademii Nauk, Tome 228 (1976) no. 2, pp. 303-305. http://geodesic.mathdoc.fr/item/DAN_1976_228_2_a11/