@article{DAN_1958_121_2_a0,
     author = {P. P. Belinskii},
     title = {The use of the variation method in solving extremum problems of quasiconformal mappings},
     journal = {Doklady Akademii Nauk},
     pages = {199--201},
     publisher = {mathdoc},
     volume = {121},
     number = {2},
     year = {1958},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1958_121_2_a0/}
}