Hermanto, T. ., Mairizal, M. and Yusrizal, Y. (2024) “Protein efficiency ratio in broiler fed hydrolyzed palm kernel meal-based rations using mannase and cellulase enzymes”, Jurnal Ilmu Peternakan dan Veteriner Tropis (Journal of Tropical Animal and Veterinary Science), 14(4), pp. 156–164. doi: 10.46549/jipvet.v14i4.407.