Caballero, Josefa, Jackie Harjani, Belén López, and Kishin Sadarangani. 2024. “Existence of Positive Solutions in the Space of Hölder Functions for a Class of Nonlinear Fractional Differential Equations With Integral Boundary Conditions”. Topological Methods in Nonlinear Analysis 63 (1):185-96. https://doi.org/10.12775/TMNA.2023.038.