Plone is a user-friendly powerful content management system - ideal as an intranet and extranet server, as a document publishing system, a portal server and as a groupware tool for collaboration between separately located entities.
G. Davis, and M. Mcgowen. proceedings of the Annual Meeting of the 26th Annual Meeting of the International Group for the Psychology of Mathematics Education (PME), 2, page 273-280. Norwich, UK, University of Norwich, (July 2002)
R. Masoon, and J. Macfeetors. proceedings of 2002 annual meeting of the Canadian Mathematics Education Study Group, page 143--144. Queen's University, (May 2002)