SHAFIK, M.; NYATHI, B.; FEKKAI, S. An Innovative 3D Ultrasonic Actuator with Multidegree of Freedom for Machine Vision and Robot Guidance Industrial Applications Using A Single Vibration Ring Transducer. International Journal of Engineering and Technology Innovation, [S. l.], v. 3, n. 3, p. 168–179, 2013. Disponível em: https://ojs.imeti.org/index.php/IJETI/article/view/108. Acesso em: 30 may. 2024.