中国科学院数学与系统科学研究院期刊网
AMS
On the Boundary Behaviour, Including Second Order Effects, of Solutions to Singular Elliptic Problems
S. BERHANU, F. CUCCU, G. PORRU
Acta Mathematica Sinica . 2007, (3): 479 -486 .  DOI: 10.1007/s10114-005-0680-8