<http://www.dlib.org/dlib/september00/09clips.html>.
<ftp://netec.mcc.ac.uk/pub/NetEc/RePEc/all/root/docu/redif_1.html>.
Per la documentazione sul modello RePEc e sullo standard ReDIF: <http://ideas.uqam.ca/ideas/data/rpcrdfdoc.html>.
The UPS prototype project: exploringthe obstacles in creating a cross e-printarchive end-user service, with Herbert Van de Sompel, Michael L. Nelson and others, Old Dominion University Computer Science TR 2000-01, February, <http://cs-tr.cs.cornell.edu:80/Dienst/UI/1.0/Display/ncstrl.odu_cs/TR_2000_01>.
Resource organisation and discovery in subject-based services, <http://www.roads.lut.ac.uk/>.
THOMAS KRICHEL, Guildford protocol, <http://ideas.uqam.ca/ideas/data/Papers/rpcrdfdocGuildP.html>.