ANSI/NISO Z39.50-2003: http://lcweb.loc.gov/z3950/agency/Z39-50-2003.pdf Attribute set Bib-1 (Z39.50-1995), semantics: ftp://ftp.loc.gov/pub/z3950/defs/ bib1.txt The Bath Profile: http://www.collectionscanada.ca/bath/tp-bath2-e.htm Bib-1 Attribute Set: http://lcweb.loc.gov/z3950/agency/defns/bib1.html Cheshire II Project: http://cheshire.berkeley.edu/ Cheshire Resources: http://gondolin.hist.liv.ac.uk/~cheshire/ Opac Università di Brescia: http://opacunibs.cilea.it Scolari, World Wide Web e Z39.50: standard per la ricerca a confronto in Bollettino AIB, 1996 n.4, p. 397-407: http://www.aib.it/aib/boll/1996/96-4-397.htm SRW/U: http://lcweb.loc.gov/z3950/agency/zing/srw/ UniBSirio: http://www.bci.unibs.it/biblio/sub144.html Z39.50 Maintenance Agency Page: http://www.loc.gov/z3950/agency/ ZING Z39.50 International: http://www.loc.gov/z3950/agency/zing/zing-home.html