@article{MAN_1985__270_182974,
     author = {Mamoru Asada},
     title = {On {Unramified} {Galois} {Extensions} {Over} {Maximum} {Abelian} {Extensions} of {Algebraic} {Number} {Fields.}},
     journal = {Mathematische Annalen},
     pages = {477--488},
     publisher = {mathdoc},
     volume = {270},
     year = {1985},
     zbl = {0557.12005},
     url = {http://geodesic.mathdoc.fr/item/MAN_1985__270_182974/}
}