LING, BAOMING, DINGYUAN FENG, JIANJUN ZUO, and ZHONGYUE ZHANG. 2012. “Preliminary Evaluation of Papain: Its Enzymatic Characteristics and Effects on Growth Performance and Nutrient Digestibility in Weaned Piglets”. The Indian Journal of Animal Sciences 82 (12): 1564–1569. https://doi.org/10.56093/ijans.v82i12.25696.