@article{IM2_1974_8_5_a4,
     author = {A. N. Varchenko},
     title = {Local topological properties of differentiable mappings},
     journal = {Izvestiya. Mathematics},
     pages = {1033--1082},
     year = {1974},
     volume = {8},
     number = {5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1974_8_5_a4/}
}