Kumar, Kamalendra, and Rakesh Kumar. “Boundary Controllability of Fractional Order Nonlocal Semi-Linear Neutral Evolution Systems With Impulsive Condition”. Discontinuity, Nonlinearity, and Complexity, vol. 8, no. 4, Aug. 2026, pp. 419-28, https://doi.org/10.5890/DNC.2019.12.006.