中国科学院数学与系统科学研究院期刊网
Consistent Fredholm and Index Operators and Generalized Property (ω')
Xiao Hong CAO, Jun Ying LIU
Acta Mathematica Sinica, Chinese Series . 2010, (5): 953 -962 .  DOI: 10.12386/A2010sxxb0106