GUTSHCHMIDT, S.; SEPLSBERG-KORSPETER, G.; HAGEDORN, P. Modeling and stability analysis for an ultrasonic motor. Vietnam Journal of Mechanics, Hanoi, Vietnam, v. 29, n. 3, p. 303–319, 2007. DOI: 10.15625/0866-7136/29/3/5542. Disponível em: https://vjs.ac.vn/index.php/vjmech/article/view/5542. Acesso em: 5 may. 2024.