Katzenbach, Jon R. The Discipline of Teams, Harvard Business Review, March-April 1993, Reprint # 93207. -- Good general article on types of teams and keys to successful teamwork
Reich, Robert B. Entrepreneurship Reconsidered: The Team As Hero, Harvard Business Review, May-June 1987. -- Nice article how the growing importance of teams to sustain American industrial competitiveness
Janis, Irving L, "Groupthink" in Small Groups and Social Interaction, Vol 2, edited by H. P. Blumberg, A. P. Hare, V. Kent, and M. Davies. John Wiley & Sones. --Short 7 page article on how decision-making often goes awry in teams.
Burck, Charles G. "What Happens When Workers Manage Themselves." Fortune, 27 July 1981, 62-69.
Hardaker, Maurice. et al. "How to Make a Team Work." Harvard Business Review. Nov/Dec 1987, v65n6, p. 112-120.
Harvard Business Publications -- Site for all of their famous business cases. There are teaching notes on teams, team building, and team leadership.
Team Center -- this commercial website has an extremely extensive bibliography on teams and teambuilding -- over 200 articles.
Center For the Study of Work Teams -- excellent site at the University of North Texas that contains extensive bibliographies, research papers, discussion groups about teams and teamwork. Has a big list of other useful links too.