ASHRAF, Z.; CHOUDHRY, M. A.; HANIF, A. A HYBRID PI CONTROL SCHEME FOR AIRSHIP HOVERING. The Nucleus, [S. l.], v. 49, n. 2, p. 115–127, 2012. Disponível em: http://thenucleuspak.org.pk/index.php/Nucleus/article/view/805. Acesso em: 21 jul. 2024.