VALKONEN, E.; RINNE, R.; VALAJA, J. Effects of perch on feed consumption and behaviour of caged laying hens. Agricultural and Food Science, [S. l.], v. 18, n. 3-4, p. 257–267, 2009. DOI: 10.23986/afsci.5964. Disponível em: https://journal.fi/afs/article/view/5964. Acesso em: 22 nov. 2024.