@article{MM2_1987__58_155219,
     author = {Hiroyuki Osada},
     title = {Note on the class-number of the maximal real subfield of a cyclomatic field.},
     journal = {Manuscripta mathematica},
     pages = {215--228},
     publisher = {mathdoc},
     volume = {58},
     year = {1987},
     zbl = {0602.12002},
     url = {http://geodesic.mathdoc.fr/item/MM2_1987__58_155219/}
}