D. Vivek, K. Kanagarajan, S. Harikrishnan. Analytic Study on Nonlocal Initial Value Problems for Pantograph Equations with Hilfer-Hadamard Fractional Derivative. Int. J. Math. And Appl. [Internet]. 2018 May 15 [cited 2024 Jul. 22];6(2 - A):21-32. Available from: https://ijmaa.in/index.php/ijmaa/article/view/636