TY - JOUR AU - Humphreys, J. F. TI - Projective modular representations of finite groups II JO - Glasgow mathematical journal PY - 1981 SP - 89 EP - 99 VL - 22 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0017089500004511/ DO - 10.1017/S0017089500004511 ID - 10_1017_S0017089500004511 ER -