1. Arduino Uno. http://arduino.cc/en/Main/arduinoBoardUno , 2014
2. Canine Companions for Independence. www.cci.org
3. Coren Stanley (1994) The intelligence of dogs: a guide to the thoughts, emotions, and inner lives of our Canine Companions. Free Press, Simon and Schuster, New York
4. FSR 400 Data Sheet: FSR 400 series round force sensing resistor. http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Sensors/ForceFlex/2010-10-26-DataSheet-FSR400-Layout2.pdf
5. Freescale. http://www.freescale.com/files/sensors/doc/data_sheet/MPL115A1.pdf