Laith Omar Aga, Noora. “Existence of Positive Solutions of Boundary Value Problem For FractionalOrder Differential Equation”. Journal of Education and Science (JES) 29, no. 2 (June 1, 2020): 149–157. Accessed August 6, 2025. https://ojs.uomosul.edu.iq/index.php/edusj/article/view/24109.