@article{DAN_1987_297_2_a4,
     author = {V. Ya. Gutlyanskii and V. I. Ryazanov},
     title = {Quasiconformal mappings with constraints of integral type on the {M.} {A.} {Lavrent'ev} characteristic},
     journal = {Doklady Akademii Nauk},
     pages = {283--286},
     publisher = {mathdoc},
     volume = {297},
     number = {2},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_297_2_a4/}
}