CATTANI, C.; SCALIA, M.; YUSHKOV, M.; ZEGZHDA, S. A. Consideration of Reaction Forces of Holonomic Constraints as Generalized Coordinates in Approximate Determination of Lower Frequencies of Elastic Systems. Technische Mechanik - European Journal of Engineering Mechanics, [S. l.], v. 28, n. 2, p. 126–139, 2019. Disponível em: https://journals.ub.ovgu.de/index.php/techmech/article/view/833. Acesso em: 3 may. 2024.