Rudnicki, Maciej. “Methods of Economical and Financial Estimation of the Public Investments in Environmental Protection Branch”. Studia Ecologiae et Bioethicae 3, no. 1 (December 31, 2005): 329–338. Accessed November 23, 2024. https://czasopisma.uksw.edu.pl/index.php/seb/article/view/7733.