A result on approximate controllability results for fractional neutral integro-differential equations with nonlocal and finite delay conditions in Hilbert spaces. Nonlinear Studies, [S. l.], v. 25, n. 1, 2018. Disponível em: https://nonlinearstudies.com/index.php/nonlinear/article/view/1656. Acesso em: 16 sep. 2025.