Belhadj, Maha, Jamal Rezaei Roshan, and Stojan Stojan Radenović. “Generalizations of Darbo’s Fixed Point-Theorem and Its Application to the Solvability of a Nonlinear Fractional Differential Equation”. Nonlinear Analysis: Modelling and Control 30 (October 7, 2025): 1–22. Accessed October 10, 2025. https://www.zurnalai.vu.lt/nonlinear-analysis/article/view/43745.