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3. European Road Safety Observatory (2022, October 06). Annual Statistical Report on Road Safety in the EU 2021. Available online: https://road-safety.transport.ec.europa.eu/statistics-and-analysis/data-and-analysis/annual-statistical-report_en.
4. European Commision (2022, October 06). Mobility and Transport- Road Safety Facts & Figures. Available online: https://ec.europa.eu/transport/road_safety/road-safety-facts-figures-1_en.
5. (2022, October 06). Road Accidents in Poland in 2021. Report of the Police Headquarters and Similar Reports from Previous Years. (In Polish).