%0 Journal Article %A Steven Arno %T The imaginary quadratic fields of class number 4 %J Acta Arithmetica %D 1991 %P 321-334 %V 60 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-60-4-321-334/ %R 10.4064/aa-60-4-321-334 %G en %F 10_4064_aa_60_4_321_334