1. NH. Hai, H Nguyen, Tap, J. of Sci. 61, 141–151 (2010).
2. Inequity in Dental Care Utilization in the Indonesian Population with a Self-Assessed Need for Dental Treatment
3. J.M. Graham, R.H. Wyatt, Preservation and Restoration of Tooth Structure, 2rd Edition, (Knowledge Books and Software, Australia, 2005) pp. 84–107.
4. J.M. Graham, R.H. Wyatt, Preservation and Restoration of Tooth Structure, 2rd Edition, (Knowledge Books and Software, \ctAustralia, 2005) pp. 21–34.
5. W. Evans., Trease and Evans Pharmacognosy, (Saunders Elsevier, New York City, 2002) pp. 246–248.