1. Central Institute for Labour Protection: Sources of exposure in work and life environment (in Polish).
https://www.ciop.pl/CIOPPortalWAR/appmanager/ciop/pl?_nfpb=true&_pageLabel=P620059861340178661073&html_tresc_root_id=32274&html_tresc_id=3000243&html_klucz=32274&html_klucz_spis=
. Accessed 13 Jan 2020
2. Uzarczyk, A.: Harmful and oppressive factors in the work environment (in Polish). Human Resources Consulting and Improvement Center, Gdańsk (2006)
3. Kollek, W., Osiński, P.: Assessment of the usefulness of energy measurement methods for identifying sound sources in hydraulic devices (in Polish). Development of hydraulic machines and device, Editorial Institution of Wrocław Board of Scientific Technical Societies Federation NOT, pp. 5–19, Wrocław (2006)
4. Kollek, W.: Problems of Active Reduction of Axial Piston Pumps Noise (in Polish). WUS&T, Wrocław (1976)
5. Bosch-Rexroth training materials