1. J.F. Nye, Physical Properties of Crystals, their Representation by Tensors and Matrices, Clarendon Press, Oxford, 1985, p. 22–23, 131–149.
2. Structure and Chemistry of the Apatites and other Calcium Orthophosphates;Elliot,1994
3. Phosphorus: An Outline of its Chemistry, Biochemistry, and Technology;Corbridge,1995
4. Single Crystal Growth and Structure Analysis of Monoclinic Hydroxyapatite
5. Influence of Grain Size on Effects of Thermal Expansion Anisotropy in MgTi2O5