T. Tanbiyaskur, W. Widanarni, and A. M. Lusiastuti, “Administration of Bacillus NP5 and Oligosaccharide to Enhance the Immune Response in Tilapia Oreochromis niloticus towards Streptococcosis”, IJSBAR, vol. 20, no. 2, pp. 304–315, Mar. 2015.