@article{SM_1967_3_3_a4,
     author = {V. A. Zorich},
     title = {A theorem of {M.\,A.~Lavrent'ev} on quasiconformal space maps},
     journal = {Sbornik. Mathematics},
     pages = {389--403},
     publisher = {mathdoc},
     volume = {3},
     number = {3},
     year = {1967},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1967_3_3_a4/}
}