@article{IM2_1976_10_6_a3,
     author = {A. N. Rudakov and I. R. Shafarevich},
     title = {Inseparable morphisms of algebraic surfaces},
     journal = {Izvestiya. Mathematics},
     pages = {1205--1237},
     year = {1976},
     volume = {10},
     number = {6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1976_10_6_a3/}
}