KRZYWORZEKA, P., and W. CIOCH. “Demodulation of Non-Stationary Machine Vibration Using Cycle-Time Scale”. Archives of Acoustics 31, no. 2 (March 30, 2014): 167–177. Accessed April 29, 2025. https://acoustics3.ippt.pan.pl/index.php/aa/article/view/666.