TY - JOUR AU - Parmenter, M. M. AU - Spiegel, E. AU - Stewart, P. N. TI - The Periodic Radical of Group Rings and Incidence Algebras JO - Canadian mathematical bulletin PY - 1998 SP - 481 EP - 487 VL - 41 IS - 4 UR - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1998-063-4/ DO - 10.4153/CMB-1998-063-4 ID - 10_4153_CMB_1998_063_4 ER -