1. Assessing teaching presence in a computer conference context;Anderson;Journal of Asynchronous Learning Networks,2001
2. Applications of cognitive psychology: Problem solving, education and computing;Berger,1987
3. Evaluating the quality of learning: the SOLO taxonomy;Biggs,1982
4. Media for interactive communication;Bretz,1983
5. Bullen, M. (1997). A case study of participation and critical thinking in a university-level course delivered by computer conferencing. Unpublished doctoral dissertation. University of British Columbia, Vancouver, Canada. Retrieved August 15, 2004, from http://www2.cstudies.ubc.ca/~bullen/Diss/thesis.doc.