1. Brigham EO. The fast Fourier transform and its applications. Prentice-Hall, Inc.; 1988.
2. Brüel & Kjær. Multi Purpose 6-channel Input Module - Type 3050 - Catalog data 2021. https://www.bksv.com/en/instruments/daq-data-acquisition/lan-xi-daq-system/daq-modules/type-3050.
3. Brüel & Kjær. Impact Hammer - Type 8206 - Catalog data 2021. https://www.bksv.com/en/transducers/vibration/impact-hammers/8206.
4. Brüel & Kjær. Microphone - Type 4189-A-021 - Catalog data 2021. https://www.bksv.com/en/transducers/acoustic/microphones/microphone-set/4189-a-021.
5. Buchalska E, Abramczyk M, Bułhak J. Composite brake shoes FR502 on railway vehicle as a substitute for cast iron shoes: laboratory in-service test. Zeszyty Naukowe Transport / Politechnika Śląska 2003;49:41–52.