@article{SM_1994_77_1_a7,
     author = {V. I. Semenov},
     title = {An extension principle for quasiconformal deformations of the~plane},
     journal = {Sbornik. Mathematics},
     pages = {127--137},
     year = {1994},
     volume = {77},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1994_77_1_a7/}
}