id	domain	url
fis-2520	www.gruppofrattura.it	http://www.gruppofrattura.it/va/50/2520.mp4
fis-2520	www.faa.gov	https://www.faa.gov/about/initiatives/maintenance_hf/library/documents/media/human_factors_maintenance/air
fis-2520	dx.doi.org	http://dx.doi.org/10.1016/j.matdes.2012.08.001
fis-2520	tigerprints.clemson.edu	https://tigerprints.clemson.edu/cgi/viewcontent.cgi?article=1512&context=all_theses
fis-2520	en.cadec-online.com	http://en.cadec-online.com/