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