Gárdonyi, Gábor, and Krisztián Samu. “Time Domain Analysis and Spectral Methods for Determining Rotational Speed of Rotary Machines”. Recent Innovations in Mechatronics, vol. 3, no. 1-2., Sept. 2016, pp. 1-8., https://doi.org/10.17667/riim.2016.1-2/8.