Mardianti, F. T., S. Sukaton, and G. Sampoerno. “Benefit of Glycerine on Surface Hardness of Hybrid & Nanofill Resin Composite”. Conservative Dentistry Journal, vol. 11, no. 1, June 2021, pp. 28-31, doi:10.20473/cdj.v11i1.2021.28-31.