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@article{DAN_1974_219_6_a1, author = {T. M. Bandman}, title = {The behavior of a quasi-conformal mapping near singular points of a characteristic}, journal = {Doklady Akademii Nauk}, pages = {1285--1288}, publisher = {mathdoc}, volume = {219}, number = {6}, year = {1974}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1974_219_6_a1/} }
T. M. Bandman. The behavior of a quasi-conformal mapping near singular points of a characteristic. Doklady Akademii Nauk, Tome 219 (1974) no. 6, pp. 1285-1288. http://geodesic.mathdoc.fr/item/DAN_1974_219_6_a1/