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@article{IVM_1968_10_a3, author = {B. G. Gabdulkhaev}, title = {Some questions of the theory of approximate {methods.~II}}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {21--29}, publisher = {mathdoc}, number = {10}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1968_10_a3/} }
B. G. Gabdulkhaev. Some questions of the theory of approximate methods.~II. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 10 (1968), pp. 21-29. http://geodesic.mathdoc.fr/item/IVM_1968_10_a3/