id	domain	url
crl-16440	creativecommons.org	http://creativecommons.org/licenses/by-nc/3.0/
crl-16440	digitalcommons.unl	http://digitalcommons.unl
crl-16440	dx.doi.org	http://dx.doi.org/doi:10.7282/t37d2s88
crl-16440	dx.doi.org	http://dx.doi.org/doi:10.7282/t37d2s88
crl-16440	dx.doi.org	http://dx.doi.org/doi:10.7282/t37d2s88
crl-16440	web.mit.edu	http://web.mit.edu/sloan/osg-seminar/f02_docs/tushmanetal_2002.pdf