ZHENG, Hongya; LI, Baoming; TONG, Qin; CHEN, Gang; LI, Xuanyang. Modification of perchery system: Preference for ramps rather than ladders during early adaptation period for cage-reared pullets. International Journal of Agricultural and Biological Engineering, [S. l.], v. 12, n. 4, p. 34–42, 2019. Disponível em: https://ijabe.migration.pkpps06.publicknowledgeproject.org/index.php/ijabe/article/view/4030. Acesso em: 27 feb. 2026.