"Hypertext Transfer Protocol—HTTP/1.0," RFC 1945T, by T. Berners-Lee, et al.: http://www.w3.org/Protocols/rfc1945/rfc1945.txt
"Hypertext Transfer Protocol—HTTP/1.1," RFC 2616, by R. Fielding, et al.: http://www.w3.org/Protocols/rfc2616/rfc2616.html
"Cachebusting—Cause and Prevention, by Martin Hamilton. draft-hamilton-cachebusting-01. Also available online at http://vancouver-webpages.com/CacheNow/.
Writing Apache Modules with Perl and C, by Lincoln Stein and Doug MacEachern (O'Reilly). Selected chapters available online at http://www.modperl.com/.
mod_perl Developer's Cookbook, by Geoffrey Young, Paul Lindner, and Randy Kobes (Sams Publishing). Selected chapters and code examples available online at http://www.modperlcookbook.org/.
Prevent the browser from caching a page http://www.pacificnet.net/~johnr/meta.html.
This page is an explanation of how to use the Meta HTML tag to prevent caching, by browser or proxy, of an individual page wherein the page in question has data that may be of a sensitive nature (as in a "form page for submittal") and the creator of the page wants to make sure that the page does not get submitted twice.