Xu, Jiafa, Jie Liu, and Donal O'Regan. “Solvability for a Hadamard-Type Fractional Integral Boundary Value Problem”. Nonlinear Analysis: Modelling and Control 28, no. 4 (April 27, 2023): 672–696. Accessed May 9, 2024. https://www.journals.vu.lt/nonlinear-analysis/article/view/32130.