@book{28306,
	author = {Gouma, D.J. and Van Lanschor, J.J.B.},
	title = {Integrated medical and surgical gastroenterology/},
	publisher = {Georg Thieme Verlag},
	year = {2004},
	address = {Stuttgart},
	url = {http://192.168.201.76/multim/B0111/B0111_cover.pdf}
}