@book{50266,
	author = {Ancona, Fabio.},
	title = {Geometric control and nonsmooth analysis :},
	publisher = {World Scientific,},
	year = {2008.},
	address = {Hackensack, NJ :},
	url = {http://www.loc.gov/catdir/toc/ecip0816/2008017673.html}
}