@article{IM_1978__44_142519,
     author = {Jacques Martinet},
     title = {Tours de corps de classes et estimations de discrimants.},
     journal = {Inventiones mathematicae},
     pages = {65--74},
     year = {1978},
     volume = {44},
     zbl = {0369.12007},
     url = {http://geodesic.mathdoc.fr/item/IM_1978__44_142519/}
}