1. Cooking Hacks: e-Health Sensor Platform V2.0 for Arduino and Raspberry Pi [Biometric/Medical Applications].
http://www.cooking-hacks.com/documentation/tutorials/ehealth-biometric-sensor-platform-arduino-raspberry-pi-medical#step4_9
2. Picard, R.W.:
http://web.media.mit.edu/~picard/index.php
3. Affective Computing: Publications.
http://affect.media.mit.edu/publications.php
4. Richmond Hypnosis Center.
http://richmondhypnosiscenter.com/2013/04/12/sample-post-two/
5. American Psychological Association: The Impact of Stress.
http://www.apa.org/news/press/releases/stress/2011/impact.aspx