1. Dual credit research outcomes for students;Andrews;Community College Journal of Research and Practice,2004
2. K12 Inc. and the Colorado Virtual Academy: A virtual charter school;Baker,2005
3. Ballas, F. A., & Belyk, D. (2000). Student achievement and performance levels in online education research study. Red Deer, AB: Schollie Research and Consulting. [retrieved 31.07.05].
4. From telematics to web-based: The progression of distance education in Newfoundland and Labrador;Barbour;British Journal of Educational Technology,2005
5. The design of web-based courses for secondary students;Barbour;Journal of Distance Learning,2005