“Product, Packaging and Waste Management Database (BDO): A New Public Service and Its Application at the Local Level in Poland”. Lex localis - Journal of Local Self-Government 18, no. 4 (October 29, 2020): 835–853. Accessed September 12, 2025. https://lex-localis.org/index.php/LexLocalis/article/view/1392.