@article{IM2_1979_13_3_a4,
     author = {I. G. Zel'venskii},
     title = {Maximal extension without simple ramification of a~local field},
     journal = {Izvestiya. Mathematics },
     pages = {647--661},
     publisher = {mathdoc},
     volume = {13},
     number = {3},
     year = {1979},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1979_13_3_a4/}
}