Mirecka, Anna. “Legal Standards and the Real Level Animal Welfare in Zoos European Union in the Light of the Directive 1999/22/EC of 29 March 1999 (SWPS, Warsaw, November 19-20, 2012)”. Studia Ecologiae et Bioethicae 11, no. 2 (June 30, 2013): 177–179. Accessed May 14, 2024. https://czasopisma.uksw.edu.pl/index.php/seb/article/view/6755.