@article{DAN_1961_137_6_a4,
     author = {V. Gavrilov},
     title = {Distortion in quasiconformal mappings},
     journal = {Doklady Akademii Nauk},
     pages = {1278--1279},
     publisher = {mathdoc},
     volume = {137},
     number = {6},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_137_6_a4/}
}