Sampled-data controllers and observer-design for uncertain semilinear systems with positivity constraints. Gulf Journal of Mathematics, [S. l.], v. 19, n. 1, p. 58–74, 2025. DOI: 10.56947/gjom.v19i1.2152. Disponível em: https://www.gjom.org/index.php/gjom/article/view/2152. Acesso em: 21 aug. 2026.