@article{IM_1976__36_142415,
     author = {Kenkichi Iwasawa},
     title = {A {Note} on {Cyclotomic} {Fields.}},
     journal = {Inventiones mathematicae},
     pages = {115--124},
     publisher = {mathdoc},
     volume = {36},
     year = {1976},
     zbl = {0342.12004},
     url = {http://geodesic.mathdoc.fr/item/IM_1976__36_142415/}
}