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@article{DAN_1977_234_3_a9, author = {M. Otelbaev}, title = {On the separability of elliptic operators}, journal = {Doklady Akademii Nauk}, pages = {540--543}, publisher = {mathdoc}, volume = {234}, number = {3}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1977_234_3_a9/} }
M. Otelbaev. On the separability of elliptic operators. Doklady Akademii Nauk, Tome 234 (1977) no. 3, pp. 540-543. http://geodesic.mathdoc.fr/item/DAN_1977_234_3_a9/