Najat Chefnaj, Khalid Hilal and Ahmed Kajouni (2022) “Existence of Solutions for Nonlinear Fractional Order Differential Equations with Quadratic Perturbations”, Results in Nonlinear Analysis, 5(3), pp. 360–371. Available at: https://www.nonlinear-analysis.com/index.php/pub/article/view/111 (Accessed: 15 August 2025).