K-Controllability and Approximate K-Controllability of Nonlinear Neutral Systems in Banach Spaces. Communications in Mathematical Research, [S. l.], v. 27, n. 3, p. 207–214, 2021. Disponível em: https://global-sci.com/index.php/cmr/article/view/8696. Acesso em: 5 dec. 2025.