S. Raynaud, E. Champion, D. Bernache-assollant, and P. Thomas, Calcium phosphate apatites with variable Ca/P atomic ratio I. Synthesis, characterisation and thermal stability of powders, Biomaterials, vol.23, issue.4, p.1065, 2002.
DOI : 10.1016/S0142-9612(01)00218-6

Y. Suetsugu, I. Shimoya, and J. Tanaka, Configuration of Carbonate Ions in Apatite Structure Determined by Polarized Infrared Spectroscopy, Journal of the American Ceramic Society, vol.46, issue.3, p.746, 1988.
DOI : 10.1111/j.1151-2916.1998.tb02403.x