@article{DAN_1977_234_4_a0,
     author = {B. N. Apanasov and V. V. Savin},
     title = {On a conjecture in the theory of spatial quasi-conformal mappings},
     journal = {Doklady Akademii Nauk},
     pages = {737--739},
     publisher = {mathdoc},
     volume = {234},
     number = {4},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1977_234_4_a0/}
}