EPP Article answers: Why the need for EPP? http://www.nwfusion.com/archive/2000/114159_12-11-2000.html?nf
Article on EPP from XML Cover Pages October 04, 2001 http://xml.coverpages.org/epp.html
Presentation by Scott Hollenbeck on EPP http://www.ietf.org/proceedings/00dec/slides/DOMREG-1/
EPP HOWTO for EPP Registrars http://epp-rtk.sourceforge.net/epp-howto.html
RTK and EPP Registry Compatibility Chart http://epp-rtk.sourceforge.net/comp_matrix.html
EPP Public Sandbox, hosted by Tucows http://epp-test.openxrs.net/
XML Trust Services http://www.verisign.com/developer/xml/epp.html
Provisioning Registry Protocol(provreg) http://www.ietf.org/html.charters/provreg-charter.html