CHANG, Hui-Shung (Christie); VILLANO, Renato. Technical and Socio-Economic Constraints to Duck Production in the Philippines: A Productivity Analysis. International Journal of Poultry Science, Pakistan, v. 7, n. 9, p. 940–948, 2008. DOI: 10.3923/ijps.2008.940.948. Disponível em: https://ijpsjournal.org/index.php/ijps/article/view/1060. Acesso em: 21 sep. 2025.