@article{DAN_1973_209_6_a6,
     author = {A. P. Kopylov},
     title = {On the behavior of quasi-conformal space mappings, close to conformal ones on hyperplanes},
     journal = {Doklady Akademii Nauk},
     pages = {1278--1280},
     publisher = {mathdoc},
     volume = {209},
     number = {6},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_209_6_a6/}
}