%0 Journal Article %A Maurice Craig %T A type of class group for imaginary quadratic fields %J Acta Arithmetica %D 1972 %P 449-459 %V 22 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-22-4-449-459/ %R 10.4064/aa-22-4-449-459 %G en %F 10_4064_aa_22_4_449_459