Louakar, A., Vivek, D., Lmou, H., Hilal, K., & Kajouni, A. (2026). Existence and Optimal Control of Hilfer Fractional Stochastic Pantograph Differential Equations. Journal of Vibration Testing and System Dynamics, 10(1), 35-51. https://doi.org/10.5890/JVTSD.2026.03.003