Existence Theory and Stability Analysis of Nonlinear Neutral Pantograph Equations via Hilfer-Katugampola Fractional Derivative. J. Adv. Appl. Computat. Math. [Internet]. 2020 Aug. 20 [cited 2026 Feb. 13];7:1-7. Available from: https://avantipublishers.com/index.php/jaacm/article/view/850