id	domain	url
flr-51	dx.doi.org	http://dx.doi.org/10.14786/flr.v1i2.51
flr-51	search.ebscohost.com	http://search.ebscohost.com/login.aspx?direct=true&db=buh&an=487650&lang=de&site=ehost-live
flr-51	www.stata-journal.com	http://www.stata-journal.com/article.html?article=st0067