@book{2511,
	author = {Blondel, Vincent. and ebrary, Inc.},
	title = {Unsolved problems in mathematical systems and control theory},
	publisher = {Princeton University Press,},
	year = {c2004.},
	address = {Princeton, N.J. :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10284076}
}