Aziz, R. C. A., Rahman, I. A., & Mohamad, D. (2012). Synthesis of Silica Hybrid Nanoparticles and the Effect of Their Addition on the Hardness of the Dental Nanocomposites. International Journal on Advanced Science, Engineering and Information Technology, 2(3), 211–214. https://doi.org/10.18517/ijaseit.2.3.188