WASET
    Kuen-Ming Shu and  Jyun-Wei Chen,  The Design of Acoustic Horns for Ultrasonic Aided Tube Double Side Flange Making .   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2015, vol. 101(5). 904 - 907
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/10001736.