~- Berners-Lee, T., "Universal Resource Identifiers in WWW: A Unifying Syntax for the Expression Objects on the Network as used in the World-Wide Web", RFC 1630, CERN, June 1994.
- Berners-Lee, T., Masinter, L., and M. McCahill, Editors, "Uniform Resource Locators (URL)", RFC 1738, CERN, Xerox Corporation, University of Minnesota, December 1994.
- Postel, J. and J. Reynolds, "File Transfer Protocol (FTP)∞", STD 9,
- RFC 959, USC/Information Sciences Institute, October 1985.