TY - JOUR AU - Singh, Surjeet TI - Quasi-Injective and Quasi-Projective Modules Over Hereditary Noetherian Prime Rings JO - Canadian journal of mathematics PY - 1974 SP - 1173 EP - 1185 VL - 26 IS - 5 UR - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1974-110-5/ DO - 10.4153/CJM-1974-110-5 ID - 10_4153_CJM_1974_110_5 ER -