@article{IM2_1998_62_6_a0,
     author = {V. A. Abrashkin},
     title = {A~group-theoretical property of the ramification filtration},
     journal = {Izvestiya. Mathematics},
     pages = {1073--1094},
     year = {1998},
     volume = {62},
     number = {6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1998_62_6_a0/}
}