JalalM. A. R., ZakariaH. A. H., HayajnehF. M., and MehyarG. M. “Performance, Carcass Characteristics, and Meat Quality of Broiler Chickens Fed β-Mannanase and Two Levels of Energy”. Tropical Animal Science Journal, Vol. 46, no. 2, May 2023, pp. 190-0, doi:10.5398/tasj.2023.46.2.190.