Bupphadong, F., Chirapongsatonkul, N., Kuepethkaew, S., Klomklao, S. and U-taynapun, K. 2019. Concentrated pineapple extract and Na-Cid® facilitates the digestion of soybean meal and shrimp feed. International Journal of Agricultural Technology. 15, 6 (Nov. 2019), 823–834.