@article{IM2_1995_59_3_a1,
     author = {V. Ya. Gutlyanskii and V. I. Ryazanov},
     title = {On the local behaviour of quasi-conformal mappings},
     journal = {Izvestiya. Mathematics },
     pages = {471--498},
     publisher = {mathdoc},
     volume = {59},
     number = {3},
     year = {1995},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1995_59_3_a1/}
}