@book{91527,
	author = {Heiduk, Günter},
	title = {WTO and world trade  challenges in a new era},
	publisher = {Physica-Verlag},
	year = {2005},
	series = {Contributions to economics},
	address = {Heidelberg (Baden-Wurtemberg, Alemania)},
	url = {http://www.loc.gov/catdir/enhancements/fy0824/2005922326-t.html}
}