S. K. Ahmed and E. A. Rasheed, “Effect of Dietary β-hydroxy-β-methylbutyrate Calcium on Carcass Cuts, Serum Biochemistry, Bone Characteristics and Digestive Tract pH of Broiler Chickens”, Int. J. Poult. Sci., vol. 16, no. 4, pp. 154–159, Mar. 2017, doi: 10.3923/ijps.2017.154.159.