Mixed Optimal Control Vector for a Boundary Value Problem of Couple Nonlinear Elliptic Equations. Iraqi Journal of Science, [S. l.], v. 63, n. 9, p. 3861–3866, 2022. DOI: 10.24996/ijs.2022.63.9.18. Disponível em: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/4516.. Acesso em: 21 nov. 2024.