RAUCH, Hans-Werner. Volieren - eine Alternative zur Käfighaltung?. agricultural engineering.eu, [S. l.], v. 56, n. 6, p. 404–405, 2001. DOI: 10.15150/lt.2001.1821. Disponível em: http://195.37.233.11/landtechnik/article/view/2001-56-6-404-405. Acesso em: 6 mai. 2024.