Hammad HA, Kattan DA, Liu Z. Approximate controllability of Caputo fractional Volterra–Fredholm integral equations under nonlocal conditions and impulsive effects. NAMC [Internet]. 2026 Jul. 18 [cited 2026 Sep. 24];31(5):1133–1157. Available from: https://www.journals.vu.lt/nonlinear-analysis/article/view/47782