@article{MM2_1988__60_2_155291,
     author = {Mikihito Hirabayashi and Ken-ichi Yoshino},
     title = {Remarks on {Unit} indices of imaginary abelian number fields.},
     journal = {Manuscripta mathematica},
     pages = {423--436},
     publisher = {mathdoc},
     volume = {60},
     number = {2},
     year = {1988},
     zbl = {0654.12002},
     url = {http://geodesic.mathdoc.fr/item/MM2_1988__60_2_155291/}
}