AfrilasariW., Widanarni.., and MeryandiniA., “Effect of Probiotic Bacillus megaterium PTB 1.4 on the Population of Intestinal Microflora, Digestive Enzyme Activity and the Growth of Catfish (Clarias sp.)”, HAYATI J Biosci, vol. 23, no. 4, p. 168, Mar. 2018.