[RFC-1630] Tim Berners-Lee. Universal Resource Identifiers in WWW. Network Working Group, Internet Engineering Task Force (IETF), June 1994, http://www.apps.ietf.org/rfc/rfc1630.html.

[RFC-1736] J Kunze Functional Recommendations for Internet Resource Locators. Network Working Group, Internet Engineering Task Force (IETF), February 1995, http://www.apps.ietf.org/rfc/rfc1736.html.

[RFC-1737] K Sollins Functional Requirements for Uniform Resource Names. Network Working Group, Internet Engineering Task Force (IETF), December 1994, http://www.apps.ietf.org/rfc/rfc1737.html.

[RFC-1738] T Berners-LeeL MasinterM McCahill. Uniform Resource Locators (URL). Network Working Group, Internet Engineering Task Force (IETF), December 1994, http://www.apps.ietf.org/rfc/rfc1738.html.

[RFC-3066] H Alvestrand Tags for the Identification of Languages. Network Working Group, Internet Engineering Task Force (IETF), December 1994, http://www.apps.ietf.org/rfc/rfc3066.html.