@book{207224,
	author = {Maidl, Bernhard. and Thewes, Markus.},
	title = {Handbook of tunnel engineering : Volume I, Structures and methods /},
	publisher = {Ernst & Sohn,},
	year = {[2013]},
	address = {Berlin :},
	url = {http://onlinelibrary.wiley.com/book/10.1002/9783433603499}
}