Bar-Cohen, Yoseph, ed. (2004). "EAP Applications, Potential, and Challenges". Electroactive Polymer (EAP) Actuators as Artificial Muscles: Reality, Potential, and Challenges (Second ed.). SPIE Digital Library. Archived from the original(PDF) on 21 December 2014. Retrieved 24 July 2013.
Bar-Cohen, Yoseph, ed. (2004). "EAP Applications, Potential, and Challenges". Electroactive Polymer (EAP) Actuators as Artificial Muscles: Reality, Potential, and Challenges (Second ed.). SPIE Digital Library. Archived from the original(PDF) on 21 December 2014. Retrieved 24 July 2013.