@book{2021,
	author = {Wright, Paul H. and Ashford, Norman J.},
	title = {Transportation Engineering : planning and design},
	publisher = {Wiley,},
	year = {1997.},
	address = {[S.l.] :},
	edition = {4th ed.},
	url = {http://10.10.170.122:8080/browse/book/26475}
}