Position Paper on the Suitability to Task of Automated Utilities for Testing Web Accessibility Compliance
http://www.stcsig.org/usability/newsletter/0304-automatedtesting.html

Killam, Bill and Bill Holland
Usability Interface
2003

Abstract:

Automated tools can make our jobs significantly easier, more thorough, and more cost effective. But, they are only the first necessary step in addressing accessibility-removing the barriers. We must now address the special condition of usability related to handicapped users and accept that user-based evaluation is the only true test of success.