@book{134453,
	author = {Maidl, Bernhard. and Thewes, Markus.},
	title = {Handbook of tunnel engineering.},
	publisher = {Ernst & Sohn,},
	year = {[2013]},
	address = {Berlin :},
	edition = {First edition.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10780746}
}