@article{DAN_1980_250_4_a0,
     author = {A. K. Varisov},
     title = {On a question concerning the geometric definition of quasiconformality},
     journal = {Doklady Akademii Nauk},
     pages = {777--779},
     publisher = {mathdoc},
     volume = {250},
     number = {4},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1980_250_4_a0/}
}