中国科学院数学与系统科学研究院期刊网
On a Measure of Non-compactness for Some Classical Operators
David E. EDMUNDS, Alberto FIORENZA, Alexander MESKHI
Acta Mathematica Sinica . 2006, (6): 1847 -1862 .  DOI: 10.1007/s10114-005-0674-6