Zawacki-Richter O, Baecker EM, Vogt S. Review of distance education research (2000 to 2008): Analysis of research areas, methods, and authorship patterns. IRRODL [Internet]. 2009 Dec. 23 [cited 2024 Nov. 3];10(6):21-50. Available from: https://www.irrodl.org/index.php/irrodl/article/view/741