TY - JOUR AU - Steven Arno TI - The imaginary quadratic fields of class number 4 JO - Acta Arithmetica PY - 1991 SP - 321 EP - 334 VL - 60 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/aa-60-4-321-334/ DO - 10.4064/aa-60-4-321-334 LA - en ID - 10_4064_aa_60_4_321_334 ER -