Patriela, M., and H. Sanjaya. “Effectiveness of Diethanolamine (DEA) Addition on Band Gap Value of SnO2 by Using Sol-Gel Methods”. Asian Journal of Science, Technology, Engineering, and Art, Vol. 2, no. 2, Feb. 2024, pp. 195-03, doi:10.58578/ajstea.v2i2.2743.