@article{10_4064_aa_84_1_59_70,
     author = {Franz Lemmermeyer},
     title = {Ideal class groups of cyclotomic number fields {II}},
     journal = {Acta Arithmetica},
     pages = {59--70},
     publisher = {mathdoc},
     volume = {84},
     number = {1},
     year = {1998},
     doi = {10.4064/aa-84-1-59-70},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-84-1-59-70/}
}