Atkinson, Cliff. Five Experts Dispute Edward Tufte on PowerPoint. 1 Apr. 2004. Sociable Media. 26 Apr. 2004. <http://sociablemedia.com/articles_dispute.htm>
Mayer, Richard E., Roxana Moreno. "Nine Ways to Reduce Cognitive Load in Multimedia Learning." Educational Psychologist 38(1) (2003): 43-52.
Shaw, Gordon, Robert Brown, and Philip Bromiley. "Strategic Stories: How 3M Is Rewriting Business Planning." Harvard Business Review May-June 1998: 41-50.
Searls, Doc. The Problem With Presentations. 16 Aug. 1998. Doc Searls. 26 Apr. 2004. < http://www.searls.com/present.html>
Tufte, Edward R. The Cognitive Style of PowerPoint. Cheshire: Graphics Press LLC, 2003.
Byrne, David. "Learning to Love PowerPoint." Wired Sep. 2003. Available online <http://www.wired.com/wired/archive/11.09/ppt1.html>
Atkinson, Cliff. Interview with Larry Lessig. 2004. <http://www.sociablemedia.com/articles_lessig.htm>
Norvig, Peter. The Gettysburg PowerPoint Presentation . Jan. 2000. Peter Norvig. 26 Apr. 2004. <http://www.norvig.com/Gettysburg/>
Cliff Atkinson has several more articles and interviews related to PowerPoint available on his site Sociable Media.
Donald Norman's personal site is http://www.jnd.org/.