GUIDES: a tool for rapid prototyping of user-computer interfaces. - J. Reese; Ray Twiddy; L. Buchanan; M. Tarka; K. C. Leung (ACM Conference on Computer Science, 1985)

Restorer: A Visualization Technique for Handling Missing Data. - Ray Twiddy; John Cavallo; Shahram M. Shiri (IEEE Visualization, 1994)