I will be adding a few resources for each seminar and HOPE that you have a chance to read them.
Other contributions, comments or suggestions welcomed as a response to this post.
An overview of the 'big three' DE theorists Homberg, Peters and Moore describe their theories and their impact at “The Theories and the Theorists: Why Theory is Important for Research” Distances et savoirs. Volume 5 – n° 3/2007 http://www.eden-online.org/contents/conferences/research/barcelona/D_S-Holmberg-Moore-Peters-Oct06.pdf
The 'seminal' and first article on the Community of Inquiry model Garrison, D. R., Anderson, T., & Archer, W. (2000). Critical inquiry in a text-based environment: Computer conferencing in higher education. The Internet and Higher Education, 2(2-3), 87–105. Retrieved February 15, 2011, from http://communitiesofinquiry.com/documents/CTinTextEnvFinal.pdf
A very critical response to the COI theory: Rourke, L., & Kanuka, H. (2009). Learning in Communities of Inquiry: A Review of the Literature. Journal of Distance Education, 23(1). http://www.jofde.ca/index.php/jde/article/view/474.
And responses from Garrison et al. Zehra, A., Arbaugh, J. B., Marti, C.-I., Garrison, D. R., Phil, I., et al. (2009). A Response to the Review of the Community of Inquiry Framework. Journal of Distance Education, 23(2). http://www.jofde.ca/index.php/jde/article/view/630.