1. Evolution of Facial Musculature and Facial Expression;Huber,1931
2. Expression of Emotions in Man and Animals;Darwin,1898
3. The Action of the M. Mentalis in the Expression of the Emotion of Distress;Lightoller;J. Anat.,1927
4. Movement Areas of the Mandible;Posselt;J. Pros. Den.,1957
5. Movement Areas of the Mandible;Posselt;J. Pros. Den.,1957