TY - JOUR AU - Krempa, Jan TI - Isomorphic Group Rings of Free Abelian Groups JO - Canadian journal of mathematics PY - 1982 SP - 8 EP - 16 VL - 34 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1982-002-8/ DO - 10.4153/CJM-1982-002-8 ID - 10_4153_CJM_1982_002_8 ER -