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@article{DAN_1971_198_3_a6, author = {E. G. D'yakonov}, title = {On approximate methods for the solution of operator equations}, journal = {Doklady Akademii Nauk}, pages = {516--519}, publisher = {mathdoc}, volume = {198}, number = {3}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1971_198_3_a6/} }
E. G. D'yakonov. On approximate methods for the solution of operator equations. Doklady Akademii Nauk, Tome 198 (1971) no. 3, pp. 516-519. http://geodesic.mathdoc.fr/item/DAN_1971_198_3_a6/