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@article{DAN_1977_236_3_a4, author = {Yu. A. Kaz'min}, title = {The closures of the linear spans of two systems of functions}, journal = {Doklady Akademii Nauk}, pages = {535--537}, publisher = {mathdoc}, volume = {236}, number = {3}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1977_236_3_a4/} }
Yu. A. Kaz'min. The closures of the linear spans of two systems of functions. Doklady Akademii Nauk, Tome 236 (1977) no. 3, pp. 535-537. http://geodesic.mathdoc.fr/item/DAN_1977_236_3_a4/