@article{MZM_1968_4_5_a3,
     author = {I. V. Dolgachev and A. N. Parshin},
     title = {The different and discriminant of regular mappings},
     journal = {Matemati\v{c}eskie zametki},
     pages = {519--523},
     publisher = {mathdoc},
     volume = {4},
     number = {5},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1968_4_5_a3/}
}