%0 Journal Article %A Franz Lemmermeyer %T Ideal class groups of cyclotomic number fields I %J Acta Arithmetica %D 1995 %P 347-359 %V 72 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-72-4-347-359/ %R 10.4064/aa-72-4-347-359 %G en %F 10_4064_aa_72_4_347_359