Abaza, I. et al. 2008. Effects of Copper Sulfate on Productive, Reproductive Performance and Blood Constituents of Laying Japanese Quail Fed Optimal and Sub-Optimal Protein. International Journal of Poultry Science. 8, 1 (Dec. 2008), 80–89. DOI:https://doi.org/10.3923/ijps.2009.80.89.