1. Adams, M.V. (2001). The Mythological Unconscious. London and New York: Karnac.
2. Barr, J. (1999). Liberating Knowledge — Research, Feminism and Adult Education. Leicester: NIACE.
3. Benigno, V. & Trentin, G. (2000). The evaluation of online courses. Journal of Computer Assisted Learning 16: 259–270.
4. Bloom, B.S. (1953). Thought processes in lectures and discussions. Journal of General Education 3: 160–167.
5. Booth, S. & Hultén, M. (2004). Opening dimensions of variation: An empirical study of learning in a web-based discussion. This volume.