Vivek, D., K. Kanagarajan, and S. Harikrishnan. 2018. “Theory and Analysis of Impulsive Type Pantograph Equations With Katugampola Fractional Derivative”. Journal of Vibration Testing and System Dynamics 2 (1): 9-20. https://doi.org/10.5890/JVTSD.2018.03.002.