Hammad, Hasanen A., Doha A. Kattan, and Zhenhai Liu. “Approximate Controllability of Caputo Fractional Volterra–Fredholm Integral Equations under Nonlocal Conditions and Impulsive Effects”. Nonlinear Analysis: Modelling and Control 31, no. 5 (July 18, 2026): 1133–1157. Accessed September 24, 2026. https://www.zurnalai.vu.lt/nonlinear-analysis/article/view/47782.