[1. Artigue, M. (1999). The teaching and Learning of Mathematics at the University Level. In Notices of the AMS, 46(11), (pp. 1377-1385)]Search in Google Scholar
[2. Brousseau, G. (1997). The theory of Didactic Situations. Kluwer, Dordrecht]Search in Google Scholar
[3. Chevallard, Y. (1992). Concepts fondamentaux de la didactique. In Recherches en Didactique des Mathematiques, (12), (pp. 73-128)]Search in Google Scholar
[4. Gleason, J. (2006). Teaching Mathematics Online: A Virtual Classroom. In Journal of Online Mathematics and its Applications (May).]Search in Google Scholar
[5. Hadjinicolaou, M. (2001). Reconstruction and Cognitive Flexibility, fundamental objectives of an OSS for mathematics. (In Greek). In Proceedings of the 1st Open and Distance learning Conference, May 25-27, Patras, Greece.]Search in Google Scholar
[6. Holmberg, B. (1995). Theory and practice of distance education. Routledge, London]Search in Google Scholar
[7. Keegan, D. (1986). The foundations of distance education. Routledge, London]Search in Google Scholar
[8. Kokkos, A. and Lionarakis, A. (1998), Open and Distance Learning. Hellenic Open University ed., Patras]Search in Google Scholar
[9. Rovai, A.P. (2002). Building Classroom Community at a Distance: A Case Study. In Educational Technology Research & Development, 49(4), (pp. 33-48)]Search in Google Scholar
[10. Schellens, T. and Valcke, M. (2006). Fostering knowledge construction in university students through asynchronous discussion groups. In Computers & Education, 46(4), (pp. 349-370)10.1016/j.compedu.2004.07.010]Search in Google Scholar
[11. Strijbos, J.W. and Fischer, F. (2007). Methodological challenges for collaborative learning research. In Learning and Instruction, 17(4), (pp. 389-393)10.1016/j.learninstruc.2007.03.004]Search in Google Scholar
[12. Yun Lu (2011). Using a Virtual Classroom to Teach Online Mathematics. Found online at http://files.eric.ed.gov/fulltext/ED519767.pdf]Search in Google Scholar
