1. Aitken, S. (2000) Understanding deafblindness. In S. Aitken, M. Buultjens, C. Clark, J. T. Eyre, & L. Pease (Eds.), Teaching children who are deafblind: Contact communication and learning. David Fulton, London.
2. Chen, D. & Haney, M. (1995) An early intervention model for infants who are deaf-blind. Journal of Visual Impairment & Blindness, 89, 213-221.
3. Cooly, E. & Oregon Research Institute (1987) Getting in touch: Communicating with a child who is deaf-blind. Research Press Company, Champaign, Illinois.
4. Daelman, M., Nafstad, A., & Rødbroe, I. (1996) Emergence of communication, Part-1 (Video). CNEFEI, Paris.
5. Daelman, M., Nafstad, A., & Rødbroe, I. (1999) Emergence of communication, Part-2 (Video). CNEFEI, Paris.