Karski, Leszek. “Spanish and German Achievements of Development of Renewable Energy Sector. Law Aspects”. Studia Ecologiae et Bioethicae 2, no. 1 (December 31, 2004): 415–430. Accessed May 19, 2024. https://czasopisma.uksw.edu.pl/index.php/seb/article/view/6847.