@article{DAN_1964_157_4_a6,
     author = {S. L. Krushkal'},
     title = {The method of variations in the theory of quasiconformal mappings of closed {Riemann} surfaces},
     journal = {Doklady Akademii Nauk},
     pages = {781--783},
     publisher = {mathdoc},
     volume = {157},
     number = {4},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_157_4_a6/}
}