Haptic Perception of 2D Pictures and 3D Objects: Accurate Mental Representation as a Function of Visual Status. - Helen Graupp; Keith Gladstone; Leanne Thompson (ICCHP, 2002)

Accessibility, Usability and Cognitive Considerations in Evaluating Systems with Users who are Blind. - Helen Graupp; Keith Gladstone; Cathy Rundle (HCI (4), 2003)