id	domain	url
dem-2903	www.dem.umk.pl	http://www.dem.umk.pl/dem
dem-2903	dx.doi.org	http://dx.doi.org/10.12775/dem.2013.009
dem-2903	dx.doi.org	http://dx.doi.org/10.1016/s1573-4463(99)30039-0
dem-2903	dx.doi.org	http://dx.doi.org/10.2307/144855
dem-2903	dx.doi.org	http://dx.doi.org/10.2307/3440211
dem-2903	dx.doi.org	http://dx.doi.org/10.1002/9781118032985
dem-2903	dx.doi.org	http://dx.doi.org/10.2307/2937881
dem-2903	dx.doi.org	http://dx.doi.org/10.2307/1914140
dem-2903	dx.doi.org	http://dx.doi.org/10.2307/2525981
dem-2903	dx.doi.org	http://dx.doi.org/10.1162/154247604323068032
dem-2903	dx.doi.org	http://dx.doi.org/10.1007/bf00924940
dem-2903	dx.doi.org	http://dx.doi.org/10.1111/j.1467-9914.2010.00480.x
dem-2903	dx.doi.org	http://dx.doi.org/10.1016/j.econlet.2003.09.008