The following publications are possibly variants of this publication:
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- Positive solutions for singular systems of three-point boundary value problemsBingmei Liu, Lishan Liu, Yonghong Wu. cma, 53(9):1429-1438, 2007. [doi]
- Multiplicity of Positive Solutions for a Singular Second-Order Three-Point Boundary Value Problem with a ParameterJian Liu, Hanying Feng, Xingfang Feng. jam, 2014, 2014. [doi]
- Positive solutions of fourth-order two point boundary value problemsB. Liu. amc, 148(2):407-420, 2004. [doi]
- Three positive solutions for second-order m-point boundary value problemsXiujun Liu, Jiqing Qiu, Yanping Guo. amc, 156(3):733-742, 2004. [doi]