1.Gutshchmidt S, Seplsberg-Korspeter G, Hagedorn P. Modeling and stability analysis for an ultrasonic motor. Vietnam J. Mech. [Internet]. 2007 Sep. 22 [cited 2026 Jan. 10];29(3):303-19. Available from: https://vjmech.vast.vn/vjmech/article/view/5542