Bjorn Freeman-Benson, <a href="http://www.cs.washington.edu/research/projects/weird/www/cooldraw-uist-93.html"> "Converting an Existing User Interface to Use Constraints"</a>, <em>Proceedings of the 1993 ACM Symposium on User Interface Software and Technology</em>, Atlanta, Georgia, November 1993, pages 207-215.  <LI>
