1. Data from 2022 Pursuant to art. 80a Paragraph. 1 and 100a sec. 1 of the Act of June 20, 1997—Road Traffic Law (Poland);Centralna Ewidencja Pojazdów i Kierowców CEPiK
2. Automarket.pl (the Owner of the Automarket.pl Website is PKO Bank Polski)
https://automarket.pl/blog/rynek/jak-pandemia-koronawirusa-zmienila-rynek-sprzedazy-samochodow/
3. Communication From the Commission to the European Parliament, The Council, The European Economic and Social Committee and the Committee of the Regions Empty, ‘Fit for 55′: Delivering the EU’s 2030 Climate Target on the way to climate neutrality, European Commission, Brussels, 14 July 2021
https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A52021DC0550
4. The Problem of the Processing of Spent Oil in the Member States of EEC;Hopmans,1974
5. Major pathways for used oil disposal and recycling. Part 1