1. International Statistical Classification of Diseases and Related Health Problems,2004
2. CD-10-CM 2015: The Complete Official Codebook,2014
3. Deformity. Available at: http://dictionary.reference.com/browse/deformity?s=t. Accessed March 16, 2015
4. Geometric Morphometrics for Biologists: A Primer;Zelditch,2012
5. Classification of malocclusion;Angle;Dent Cosmos,1899