Automatic Generation of Textual, Audio, and Animated Help in UIDE: The User Interface Design. - Piyawadee Noi Sukaviriya; Jeyakumar Muthukumarasamy; Anton Spaans; Hans J. J. de Graaff (Advanced Visual Interfaces, 1994)

Spam, spam, spam, spam: how can we stop it. - Jenny Preece; Jonathan Lazar; Elizabeth F. Churchill; Hans J. J. de Graaff; Batya Friedman; Joseph A. Konstan (CHI Extended Abstracts, 2003)