@article{JRAM_1985__358_152721,
     author = {Shin Nakano},
     title = {On ideal groups of algebraic number fields.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {61--75},
     publisher = {mathdoc},
     volume = {358},
     year = {1985},
     zbl = {0559.12004},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1985__358_152721/}
}