Marlida, Rini, et al. “Growth, Digestive Enzyme Activity and Health Status of Humpback Grouper (Cromileptes Altivelis) Fed With Synbiotic”. Pakistan Journal of Nutrition, vol. 13, no. 6, May 2014, pp. 319–326, https://doi.org/10.3923/pjn.2014.319.326.