1. Racial ethnocentricisim and judgement of beauty;Martin;Journal of Psychology,1964
2. New Mexico State University, Department Psychology Website. Las Cruses, NM. Available at: 〈http://www.cs.nmsu.edu/∼ipivkina/Spring05cs579/StudentPres/Faces.pdf〉 April 2011.
3. Esthetics and its relation to orthodontic therapy;Riedel;Angle Orthodontist,1950
4. The enigma of facial beauty: esthetics, proportions, deformity, and controversy;Naini;American Journal of Orthodontics and Dentofacial Orthopedics,2006
5. Proportions of the Aesthetic Face;Powell,1984