Utomo, N. B. P., N. ., and J. Ekasari. “Fermentation of Azolla Sp. Leaves and the Utilization As a Feed Ingredient of Tilapia Oreochromis Sp.”. Jurnal Akuakultur Indonesia, Vol. 10, no. 2, Mar. 2015, pp. 137-43, doi:10.19027/jai.10.137-143.