N. SONI, S. K. MISHRA, R. K. SWAIN, A. DAS, N. C. BEHURA, and K. SETHI, “Effect of supplementation of organic zinc on the zinc level and quality traits of eggs in broiler breeders”, Indian J of Anim Sci, vol. 85, no. 9, pp. 1025–1030, Sep. 2015, doi: 10.56093/ijans.v85i9.51748.