@article{ZNSL_1987_160_a16,
     author = {S. V. Vostokov},
     title = {Lutz filtration as {Galois} module in an extension without higher ramification},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {182--192},
     year = {1987},
     volume = {160},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1987_160_a16/}
}