@book{33155,
	author = {David, René, and Alla, H.},
	title = {Discrete, continuous, and hybrid Petri Nets /},
	publisher = {Springer,},
	year = {c2010.},
	address = {Berlin :},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy1315/2009942252-t.html}
}