@article{SM_1973_21_2_a4,
     author = {E. A. Poletskii},
     title = {On~the removal of singularities of quasiconformal mappings},
     journal = {Sbornik. Mathematics},
     pages = {240--254},
     year = {1973},
     volume = {21},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1973_21_2_a4/}
}