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@article{DAN_1969_189_2_a2, author = {G. M. Vainikko}, title = {Compact approximation of operators and approximate solution of operator equations}, journal = {Doklady Akademii Nauk}, pages = {237--240}, publisher = {mathdoc}, volume = {189}, number = {2}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1969_189_2_a2/} }
G. M. Vainikko. Compact approximation of operators and approximate solution of operator equations. Doklady Akademii Nauk, Tome 189 (1969) no. 2, pp. 237-240. http://geodesic.mathdoc.fr/item/DAN_1969_189_2_a2/