Agustantina, Titien Hary. “The Effect of Voltage and Time of Exposure on Surface Hardness of Resin Modified Glass Ionomer Cement”. Dental Journal 40, no. 2 (June 1, 2007): 94–97. Accessed August 2, 2024. https://e-journal.unair.ac.id/MKG/article/view/1061.