1. Global K-means (GKM) clustering algorithm: A survey;Agrawal;International Journal of Computer Application,2013
2. Changing course: Ten years of tracking online education in the United States;Allen,2013
3. k-means++: The advantages of careful seeding;Arthur,2007
4. Online course experience matters: Investigating students' perceptions of online learning;Astani;Issues in Information Systems,2010
5. Metacognition and learning technologies: An overview of current interdisciplinary research;Azevedo,2013