@article{DAN_1967_172_3_a5,
     author = {A. P. Kopylov},
     title = {On the richness of the class of quasiconformal mappings of regions in three-dimensional {Euclidean} space},
     journal = {Doklady Akademii Nauk},
     pages = {527--528},
     publisher = {mathdoc},
     volume = {172},
     number = {3},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1967_172_3_a5/}
}