A. Louakar, D. Vivek, A. Kajouni, and K. Hilal, “Topological Degree Method for Stochastic Pantograph Differential Equation with Hilfer Fractional Derivative Involving Non-instantaneous Impulses”, DNC, vol. 15, no. 3, pp. 315–330, Aug. 2026, doi: 10.5890/DNC.2026.09.002.