KAHRAMANLI, H.; ALLAHVERDI, N. Particle Swarm Optimization with Flexible Swarm for Unconstrained Optimization. International Journal of Intelligent Systems and Applications in Engineering, [S. l.], v. 1, n. 1, p. 8–13, 2013. Disponível em: https://www.ijisae.org/index.php/IJISAE/article/view/7. Acesso em: 11 oct. 2025.