Developing Your Site for Performance, Part II: Optimal Cache Control
http://www.uigarden.net/english/developing-your-site-for-performance-part-ii-optimal-cache-control

Powell, Thomas A. and Joe Lima
uiGarden
2005

Abstract:

Focuses primarily on sending that data as infrequently as possible by means of better utilization of caching on the Web. Once you start to design your sites with an eye towards effective caching control, you will dramatically reduce page load times for your users - particularly your most loyal, repeat visitors - as well as lower your overall bandwidth consumption and free up your server resources.