@article{IM2_2004_68_3_a5,
     author = {Vik. S. Kulikov and D. Auroux and V. V. Shevchishin},
     title = {Regular homotopy of {Hurwitz} curves},
     journal = {Izvestiya. Mathematics },
     pages = {521--542},
     publisher = {mathdoc},
     volume = {68},
     number = {3},
     year = {2004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2004_68_3_a5/}
}