Shiang-Hwua Yu and Po-Hsun Wu, Two Kinds of Self-Oscillating Circuits Mechanically Demonstrated. journal = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology. March 2014, vol. 91(7). 1334 - 1338 [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/10000983.