1. Body piercing in England: A survey of piercing at sites other than earlobe;Bone;British Medical Journal,2008
2. The Psychophysics Toolbox;Brainard;Spatial Vision,1997
3. Visible skin color distribution plays a role in the perception of age, attractiveness, and health in female faces;Fink;Evolution and Human Behavior,2006
4. When facial attractiveness is only skin deep;Jones;Perception,2004
5. Kawahara , J. Kitazaki , M. 2013 Proceedings of the Association for Computing Machinery Symposium on Applied Perception 10.1145/2492494.2501899