S. Agustina, N. S. Indrasti, . Suprihatin, and N. T. Rohman, “Synthesis of Nano Zinc Oxide from Galvanized Industrial Waste by Using a Combination Method of SOL-Gel, Sonochemical and Calcination”, IJSBAR, vol. 22, no. 1, pp. 151–164, Apr. 2015.