中国科学院数学与系统科学研究院期刊网
On Generalized Inverses of Morphisms with Universal-factorization
Yong Zhi CAO(1),Ping ZHU(2)
Acta Mathematica Sinica, Chinese Series . 2001, (3): 559 -566 .  DOI: 10.12386/A2001sxxb0073