[1]
Zawacki-Richter, O. et al. 2009. Review of distance education research (2000 to 2008): Analysis of research areas, methods, and authorship patterns. The International Review of Research in Open and Distributed Learning. 10, 6 (Dec. 2009), 21–50. DOI:https://doi.org/10.19173/irrodl.v10i6.741.