Sedigheh Joughehdoust, Aliasghar Behnamghader, and Abdollah Afshar, “Deposition of Nano-Crystalline Fluor-hydroxyapatite Coatingson Titanium Substrates via Sol-Gel Method: Deposition of nano-crystalline fluorhydroxyapatite coatings on titanium substrates”, Iran J Pharm Sci, vol. 4, no. 2, pp. 169–176, Apr. 2008.