Shindor, Olga; Svirina, Anna: 'Methods of signal analysis for vibration control at hydropower plants' (Energy Engineering, 2017), 'Modeling and Dynamic Behaviour of Hydropower Plants', Chap. 6, pp. 131-145, DOI: 10.1049/PBPO100E_ch6
IET Digital Library, https://digital-library.theiet.org/;jsessionid=3r0eu1kp61kaf.x-iet-live-01content/books/10.1049/pbpo100e_ch6