%0 Journal Article %A Hershy Kisilevsky %A Francesco Pappalardi %T On the exponent of the ideal class groups of imaginary extensions of $ %J Acta Arithmetica %D 1995 %P 311-321 %V 72 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-72-4-311-321/ %R 10.4064/aa-72-4-311-321 %G en %F 10_4064_aa_72_4_311_321