- http://www.ty2u.com/404sefx-manual.html is the manual
- http://www.ty2u.com/downloads/404sefx.html is the download page
- http://www.artio.cz/downloads/joomla-extensions/ published a pagination patch for SEF404x together with expansion modules, e.g. for DocMan
- http://www.joomla.org/content/view/1335/37/ is an announcement of 404SEFx's release on the Joomla site.
- http://forum.joomla.org/index.php/topic,63419.0.html is an announcement of a release of a forked version of 404SEFx, on May 21, 2006, 11:36:55 AM