HASSAN , S.M.; AL AQIL, A.A. Effect of Adding Dietary Date (Phoenix dactylifera) Pits Meal With/or Without β -mannanase on Productive Performance and Eggshell Quality Parameters of Layer Hens. International Journal of Poultry Science, Pakistan, v. 14, n. 11, p. 595–601, 2015. DOI: 10.3923/ijps.2015.595.601. Disponível em: https://ijpsjournal.org/index.php/ijps/article/view/2216. Acesso em: 21 sep. 2025.