SALIM YOUNS ANAS YOUNS, A.; أنس; GHAFOOR SALIM, A.; عبد. Study of Stability of Non-linear Model with Hyperbolic Secant Function. Journal of Education and Science (JES), [S. l.], v. 28, n. 1, p. 106–120, 2019. DOI: 10.33899/edusj.2019.160917. Disponível em: https://rjps.uomosul.edu.iq/index.php/edusj/article/view/17445. Acesso em: 4 aug. 2025.