Guo, Xiulan, and Gongwei Liu. “Existence of Positive Solutions for the Boundary Value Problem of a Nonlinear Fractional Differential Equation”. JOURNAL OF ADVANCES IN MATHEMATICS 10, no. 9 (July 4, 2015): 3862–3875. Accessed November 23, 2024. https://rajpub.com/index.php/jam/article/view/1897.