id	domain	url
dem-1050	www.dem.umk.pl	http://www.dem.umk.pl/dem
dem-1050	www.gpw.pl	www.gpw.pl
dem-1050	ssrn.com	http://ssrn.com
dem-1050	bura.brunel.ac.uk	http://bura.brunel.ac.uk/bitstream/2438/5056/1/1009%5b1%5d.pdf
dem-1050	www.cerge-ei.cz	http://www.cerge-ei.cz/pdf/wp/wp382.pdf
dem-1050	www.cerge-ei.cz	http://www.cerge-ei.cz/pdf/wp/wp349.pdf
dem-1050	www.nber.org	http://www.nber.org/papers/w7354.pdf