Research on recent use of face tracking

https://www.youtube.com/watch?v=24qUFDdZAG8

https://www.youtube.com/watch?v=ruvqxi43V-0

https://www.youtube.com/watch?v=MMa2oT1wMIs

https://www.youtube.com/watch?v=j1J41aJQjbQ

https://vimeo.com/60173908

https://www.lynda.com/After-Effects-tutorials/VFX-Techniques-Tracking-Objects-Onto-Face/114013-2.html
https://www.youtube.com/watch?v=jgdbtvPY38Q

https://vimeo.com/103425574
http://mashable.com/2016/03/20/face-tracking-software/#pRYgYmuh5uqV
http://venturebeat.com/2015/04/30/microsofts-face-recognition-app-how-old-turns-into-a-meme-because-it-gets-everyones-age-wrong/

Faceshift: http://doc.faceshift.com/studio/2015.2/introduction.html

Primates study

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2238342/

http://anthro.palomar.edu/behavior/behave_4.htm

http://www.chimpfacs.com/conference.html

http://www.bridgetwaller.com/PARRetal2007a.pdf