中国科学院数学与系统科学研究院期刊网
Existence and Uniqueness of Positive Solutions for Some Singular Boundary Value Problems with Linear Functional Boundary Conditions
Zeng Qin ZHAO, Fu Shan LI
Acta Mathematica Sinica . 2011, (10): 2073 -2084 .  DOI: 10.1007/s10114-011-8023-4