中国科学院数学与系统科学研究院期刊网
Homological Dimensions and Characterization of PS-Ring
Jing Hua YANG(1),Wen Ting TONG
Acta Mathematica Sinica, Chinese Series . 2002, (6): 1065 -106 .  DOI: 10.12386/A2002sxxb0138