LEONOV, G. A.; SMIRNOVA, V. B.; SPERLING, L. A Frequency-Domain Criterion for Global Stability of Systems with Angular Coordinates. Technische Mechanik - European Journal of Engineering Mechanics, [S. l.], v. 17, n. 3, p. 223–229, 2019. Disponível em: https://journals.ub.ovgu.de/index.php/techmech/article/view/1202. Acesso em: 28 apr. 2024.