TY - JOUR AU - G. Pall AU - Hubert Butts TI - Modules and binary quadratic forms JO - Acta Arithmetica PY - 1968 SP - 23 EP - 44 VL - 15 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/aa-15-1-23-44/ DO - 10.4064/aa-15-1-23-44 LA - en ID - 10_4064_aa_15_1_23_44 ER -