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@article{DAN_1965_162_1_a5, author = {E. Sh. Chatskaya}, title = {Some approximation problems on sets in the complex plane}, journal = {Doklady Akademii Nauk}, pages = {30--32}, publisher = {mathdoc}, volume = {162}, number = {1}, year = {1965}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1965_162_1_a5/} }
E. Sh. Chatskaya. Some approximation problems on sets in the complex plane. Doklady Akademii Nauk, Tome 162 (1965) no. 1, pp. 30-32. http://geodesic.mathdoc.fr/item/DAN_1965_162_1_a5/