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@article{DAN_1976_231_2_a6, author = {A. P. Kopylov}, title = {Integral averages and quasi-conformal mappings}, journal = {Doklady Akademii Nauk}, pages = {289--291}, publisher = {mathdoc}, volume = {231}, number = {2}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1976_231_2_a6/} }
A. P. Kopylov. Integral averages and quasi-conformal mappings. Doklady Akademii Nauk, Tome 231 (1976) no. 2, pp. 289-291. http://geodesic.mathdoc.fr/item/DAN_1976_231_2_a6/