@article{SM_1970_12_2_a7,
     author = {E. A. Poletskii},
     title = {The modulus method for nonhomeomorphic quasiconformal mappings},
     journal = {Sbornik. Mathematics},
     pages = {260--270},
     publisher = {mathdoc},
     volume = {12},
     number = {2},
     year = {1970},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1970_12_2_a7/}
}