Gutekunst, Mike. Electrical motors Scott Owen. 2 March 2011.
Hughes, Austin. Electric Motors and Drives: Fundamentals, Types and Applications. Elsevier, May 22, 2010.
Rafi, Najam. Basics of AC Motors. 18 Febuary 2011 http://www.scribd.com/full/6357919?access_key=key-xvhfklk5phgk5r4708n.
Siemens. Basics of AC Motors. 18 Febuary 2011 <http://www3.sea.siemens.com/step/templates/lesson.mason?motors:2:5:5#>.
Husain, Iqbal. Electric and Hybrid Vehicles Design Fundamentals. 2nd. Boca Raton, FL: CRC Press, 2011. 486. Print.
Ehsani. Mehrdad. Modern electric, hybrid electric, and fuel cell vehicles: fundamentals, Theory, and design. 2nd. Boca Raton, FL: CRC Press, 2011. 519. Print
Brain, Marshall. "How Electric Cars Work" 27 March 2002. HowStuffWorks.com. <http://www.howstuffworks.com/electric-car.htm> 07 February 2011.