%0 Journal Article %A Stéphane R. Louboutin %T Lower bounds for relative class numbers of imaginary abelian number fields and CM-fields %J Acta Arithmetica %D 2006 %P 199-220 %V 121 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa121-3-1/ %R 10.4064/aa121-3-1 %G en %F 10_4064_aa121_3_1