GUO, X.; LIAO, X.; WANG, Q.; WEN, Y.; WU, T. Designing Active Disturbance Rejection Control of Permanent Magnetic Spherical Actuator Based on Nonlinear Extended State Observer. Elektronika ir Elektrotechnika, [S. l.], v. 28, n. 1, p. 23-31, 2022. DOI: 10.5755/j02.eie.30102. Disponível em: https://eejournal.ktu.lt/index.php/elt/article/view/30102. Acesso em: 2 may. 2024.