中国科学院数学与系统科学研究院期刊网
Nonexistence Existence and Multiplicity Results for Sturm-Liouville Boundary Value Problems
Wen Jie GAO, Jun Yu WANG, Zhon
Acta Mathematica Sinica, Chinese Series . 2005, (4): 739 -746 .  DOI: 10.12386/A2005sxxb0090