@article{SM_1972_16_2_a5,
     author = {O. Ya. Viro},
     title = {Linkings, two-sheeted branched coverings and braids},
     journal = {Sbornik. Mathematics},
     pages = {223--236},
     publisher = {mathdoc},
     volume = {16},
     number = {2},
     year = {1972},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1972_16_2_a5/}
}