TY - JOUR AU - Bashir, M. A. TI - Notice of Retraction JO - Canadian mathematical bulletin PY - 1991 SP - 294 EP - 294 VL - 34 IS - 3 UR - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1991-047-2/ DO - 10.4153/CMB-1991-047-2 ID - 10_4153_CMB_1991_047_2 ER -