TY - JOUR AU - Bell, Howard E. AU - Daif, Mohamad Nagy TI - On Commutativity and Strong Commutativity-Preserving Maps JO - Canadian mathematical bulletin PY - 1994 SP - 443 EP - 447 VL - 37 IS - 4 UR - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1994-064-x/ DO - 10.4153/CMB-1994-064-x ID - 10_4153_CMB_1994_064_x ER -