Mirecka A. 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). seb [Internet]. 2013 Jun. 30 [cited 2024 Nov. 22];11(2):177-9. Available from: https://czasopisma.uksw.edu.pl/index.php/seb/article/view/6755