SOURCES

1. Fox, Juliet. "Stout University of Wisconsin, Introduction to Technology"
Available: http://post.uwstout.edu/a/allisonj/

2. Northwestern University Medical School. "History and Prosthetics"
Available: http://www.amputeeresource.org/History%20and%20prosthetics.htm

3. Otto Bock Health Care. "Otto Bock SensorHand"
Available: http://www.ottobockus.com/products/op_ehand.htm

4. Otto Bock Health Care. "3C100 C-Leg System"
Available: http://www.ottobockus.com/products/op_lower_cleg.htm

5. Columbia University. "Piezoelectric Effect"
Available: http://www.factmonster.com/ce6/sci/A0839004.html

6. Columbia Electronic Encyclopedia. "Piezoelectric Effect"
Available: http://www.encyclopedia.com/articles/10190.html

7. Kistler Instrumente AG Winterthur. "The Piezoelectric Effect, Theory, Design, and Usage"
Available: http://www.kistler.ch/f_tech_theory_text.htm