@article{GDZPPN002190095,
title = {On the class-number of the maximal real subfield of a cyclotomic field.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {272},
year = {1975},
pages = {217-220},
zbl = {0313.12003},
url = {http://dml.mathdoc.fr/item/GDZPPN002190095}
}
Yamaguchi, Itaru. On the class-number of the maximal real subfield of a cyclotomic field.. Journal für die reine und angewandte Mathematik, Tome 272 (1975) pp. 217-220. http://gdmltest.u-ga.fr/item/GDZPPN002190095/