Hatta U, Sjofjan O, Subagiyo I and Sundu B 2014: Effects of fermentation by Trichoderma viride on nutritive value of copra meal, cellulase activity and performance of broiler chickens. Livestock Research for Rural Development. Volume 26, Article #61. Retrieved , from http://www.lrrd.org/lrrd26/4/hatt26061.htm