AgustinusF., Widanarni.., and EkasariJ., “Microbial abundance and diversity in water, and immune parameters of red tilapia reared in bioflocs system with different fish density (25 fish/m3, 50 fish/m3, and 100 fish/m3)”, Jurnal Akuakultur Indonesia, vol. 9, no. 2, pp. 157-167, Jul. 2010.