@article{ZNSL_1973_31_a6,
     author = {I. G. Zel'venskii},
     title = {Extensions of local fields without simple ramification},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {102--105},
     year = {1973},
     volume = {31},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1973_31_a6/}
}