@book{51243,
	author = {International Symposium on Geotechnical Aspects of  Underground Construction in Soft Ground and Ng, C. W. W},
	title = {Geotechnical aspects of underground construction in soft ground :},
	publisher = {CRC ,},
	year = {c2009},
	address = {Boca Raton, FL ;},
	note = {Includes bibliographical records and index}
}