@book{32840,
	author = {Sen, P. C.},
	title = {Principles of electric machines and power electronics /},
	publisher = {Wiley,},
	year = {c1989.},
	address = {New York :},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/enhancements/fy0607/88005725-d.html}
}