1. Bates, E., Benigni, L., Bretherton, I., Camaioni, L., & Volterra, V. (1977). From gesture to the first word: On cognitive and social prerequisites. In M. Lewis & L. Rosenblum (Eds.),Interaction, conversation and the development of language (pp. 247?307). New York: Wiley.
2. Budden, S., Meek, M., & Henighan, C. (1990). Communication and oral-motor function in Rett syndrome.Developmental Medicine and Child Neurology, 32, 51?55.
3. Coleman, M., Brubaker, J., Hunter, K., & Smith, G. (1988). Rett syndrome: A survey of North American patients.Journal of Mental Deficiency Research, 32, 117?124.
4. Donellan, A. M., Mirenda, P. L., Mesaros, R. A., & Fassbender, L. L. (1984). Analyzing the communicative functions of aberrant behaviour.Journal of the Association for the Severely Handicapped, 9, 201?212.
5. Dunst, C. J. (1980).A clinical and educational manual for use with the Uzgiris and Hunt Scales of Infant Psychological Development. Austin, TX: Pro-Ed.