Ruhul Amin, M. ., and E. N. . Hamidi. “Effect of Phytase Supplementation on the Performance of Babcock-380 Layer Hens”. Journal of Tropical Resources and Sustainable Science (JTRSS), vol. 1, no. 1, Jan. 2013, pp. 36-41, doi:10.47253/jtrss.v1i1.668.