@article{JRAM_1978__301_152031,
     author = {Mutsuo Watabe},
     title = {On class numbers of some cyclotomic fields.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {212--215},
     publisher = {mathdoc},
     volume = {301},
     year = {1978},
     zbl = {0375.12005},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1978__301_152031/}
}