Habibie, S., D. Djumanto, and R. Rustadi. “The Use of Otolith to Determine Age and Spawning Time of Red Devil Amphilophus Labiatus [Gunther, 1864] in Sermo Reservoir, Yogyakarta”. Jurnal Iktiologi Indonesia, Vol. 15, no. 2, June 2015, pp. 87-98, doi:10.32491/jii.v15i2.63.