M. Sasajima and  T. Yamaguchi and  Y. Koike and  A. Hara,  Chaotic Oscillations of Diaphragm Supported by Nonlinear Springs with Hysteresis.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2012, vol. 71(11). 2349 - 2355
    [viewed 12 July 2020]. Available from: https://publications.waset.org/pdf/1556.