@book{6323,
	author = {Horn, Roger A. and Johnson, Charles R.},
	title = {Matrix analysis /},
	publisher = {Cambridge University Press,},
	year = {1985.},
	address = {Cambridge [Cambridgeshire] ;},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/toc/cam023/85007736.html}
}