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@article{DAN_1974_219_3_a11, author = {V. G. Sheretov}, title = {The {Dirichlet} principle and extremal quasi-conformal mappings of open {Riemann} surfaces}, journal = {Doklady Akademii Nauk}, pages = {558--560}, publisher = {mathdoc}, volume = {219}, number = {3}, year = {1974}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1974_219_3_a11/} }
V. G. Sheretov. The Dirichlet principle and extremal quasi-conformal mappings of open Riemann surfaces. Doklady Akademii Nauk, Tome 219 (1974) no. 3, pp. 558-560. http://geodesic.mathdoc.fr/item/DAN_1974_219_3_a11/