1. Barnes D., Todd F. (1995). Communication and learning revisited. Heinemann: Portsmouth, NH
2. Cochran-Smith M. (1984). The making of a reader. Ablex Publishing: Norwood, NJ
3. Dudley-Marling C., Searle D. (1991). When students have time to talk: Creating contexts for learning language. Heinemann: Portsmouth, NH
4. Dyson A. (1989). Multiple worlds of child writers: Friends learning to write. Teachers College Press: New York
5. Fernandez M., Wegerif R., Mercer N., Rojas-Drummond S. (2001). Re-conceptualizing “scaffolding” and the zone of proximal development in the context of symmetrical collaborative learning. Journal of Classroom Interaction 36(2): 40–54