QOCAYEVA, Nubar; QULIYEV, Merdan. Extrema of Multivariable Functions: Local, Global, and Constrained Optimization. Porta Universorum, [S. l.], v. 2, n. 6, p. 32–38, 2026. DOI: 10.69760/portuni.26060005. Disponível em: https://egarp.lt/index.php/JPURM/article/view/638.. Acesso em: 10 jun. 2026.