@book{7901,
	author = {Shepherd, W. and Hulley, L. N.},
	title = {Power electronics and motor control /},
	publisher = {Cambridge University Press,},
	year = {1995.},
	address = {Cambridge ;},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/description/cam026/94046438.html}
}