Y. S. CHEAH, T. C. LOH, H. AKIT, and S. KIMKOOL, “Growth performance, abdominal fat and fat digestibility in broiler chicken fed with synthetic emulsifier and natural biosurfactant”, Indian J of Anim Sci, vol. 87, no. 4, pp. 464–472, Apr. 2017, doi: 10.56093/ijans.v87i4.69602.