@book{207328,
	author = {Maidl, Bernhard. and Thewes, Markus.},
	title = {Handbook of tunnel engineering II : basics and additional services for design and construction /},
	publisher = {Ernst & Sohn,},
	year = {2014.},
	address = {Berlin, Germany :},
	url = {http://onlinelibrary.wiley.com/book/10.1002/9783433603536}
}