TY - JOUR AU - J. Ahsan TI - Semi-local rings and quasi-projective modules JO - Commentationes Mathematicae PY - 1980 SP - 5 EP - 7 VL - 21 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.14708/cm.v21i1.5957/ DO - 10.14708/cm.v21i1.5957 LA - pl ID - 10_14708_cm_v21i1_5957 ER -