Team, Support. “Existence and Ulam Stability of Solution to Fractional Order Hybrid Differential Equations of Variable Order: Norravich Limpanukorn, Parinya Sa Ngiamsunthorn”. Thai Journal of Mathematics 18, no. 1 (March 1, 2020): 453–463. Accessed July 3, 2024. https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/1009.