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@article{IVM_1988_12_a11, author = {G. S. Zhukova}, title = {Minimal smoothness of coefficients in the construction of approximate solutions}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {63--67}, publisher = {mathdoc}, number = {12}, year = {1988}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1988_12_a11/} }
G. S. Zhukova. Minimal smoothness of coefficients in the construction of approximate solutions. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 12 (1988), pp. 63-67. http://geodesic.mathdoc.fr/item/IVM_1988_12_a11/