Comparing Open Source CMSes: Joomla, Drupal, and Plone
http://www.nten.org/node/1022

Quinn, Laura S., Ryan Ozimek, David Geilhufe and Patrick Shaw
NTEN
2007

Abstract:

Open source content management systems (CMS) are particularly attractive to the nonprofit community because of their cost-efficiency, but what do these systems actually do? And what are the differences between the most common CMSs? We’ll compare Joomla, Drupal, and Plone for typical nonprofit needs.