GUTSHCHMIDT, Stefanie; SEPLSBERG-KORSPETER, Gottfred; HAGEDORN, Peter. Modeling and stability analysis for an ultrasonic motor. <b>Vietnam Journal of Mechanics</b>, Hanoi, Vietnam, v. 29, n. 3, p. 303–319, 2007. DOI: 10.15625/0866-7136/29/3/5542. Disponível em: https://vjmech.vast.vn/vjmech/article/view/5542. Acesso em: 10 jan. 2026.