中国科学院数学与系统科学研究院期刊网
On the Eigenvalue Criteria for Positive Solutions of Nonlinear Boundary Value Problems
Yong Xiang LI, Ai Lan LIU
Acta Mathematica Sinica, Chinese Series . 2017, (4): 631 -640 .  DOI: 10.12386/A2017sxxb0052