Variable Structure Control Design for a Magnetic Levitation System. Journal of Engineering, [S. l.], v. 24, n. 12, p. 84–103, 2018. DOI: 10.31026/j.eng.2018.12.08. Disponível em: https://joe.uobaghdad.edu.iq/index.php/main/article/view/676. Acesso em: 31 mar. 2025.