1. Perception (3rd edition), Chapter 11 Touch;Blake,1994
2. The Psychology of Touch;Heller,1991
3. Tactual Perception: A Sourcebook;Schiff,1982
4. Blindness and Children. An Individual Differences Approach;Warren,1994
5. Hands on: haptic exploratory strategies in children who are blind with multiple disabilities;McLinden;The British Journal of Visual Impairment,1999