@article{DAN_1972_206_3_a10,
     author = {A. V. Sychev},
     title = {On a quasi-conformal mapping of a sphere onto itself},
     journal = {Doklady Akademii Nauk},
     pages = {556--558},
     publisher = {mathdoc},
     volume = {206},
     number = {3},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1972_206_3_a10/}
}