中国科学院数学与系统科学研究院期刊网
AMS
On (N, U)-Coherence of Modules and Rings
Zhong Kui LIU, Javed AHSAN
Acta Mathematica Sinica . 2004, (1): 105 -114 .  DOI: 10.1007/s10114-003-0294-y