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@article{DAN_1979_245_3_a2, author = {I. I. Golichev}, title = {Approximation of an element in the range of a function of an operator}, journal = {Doklady Akademii Nauk}, pages = {527--530}, publisher = {mathdoc}, volume = {245}, number = {3}, year = {1979}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1979_245_3_a2/} }
I. I. Golichev. Approximation of an element in the range of a function of an operator. Doklady Akademii Nauk, Tome 245 (1979) no. 3, pp. 527-530. http://geodesic.mathdoc.fr/item/DAN_1979_245_3_a2/