1. Ramkumar N, P. Venkat Rangan, G. Uma, B. Hariharan, “Instructor Contour Extraction and Overlay for Near Real Presence In E-Learning Systems”, International Conference on Computer supported Education (2016)
2. Lowe, David G. “Distinctive image features from scale-invariant keypoints.” International journal of computer vision 60.2 (2004): 91-110.
3. Bijlani, Kamal, Jayahari KR, and Ancy Mathew. “A-view: real-time collaborative multimedia e-learning.” Proceedings of the third international ACM workshop on Multimedia technologies for distance learning. ACM, 2011.
4. WebEx, Cisco. “Cisco WebEx Meetings.” Luettavissa: http://www.webex.com/products/web-conferencing.html . Luettu 18 (2014): 2014.
5. Karabulut, Aliye, and Ana Correia. “Skype, Elluminate, Adobe Connect, Ivisit: A comparison of web-based video conferencing systems for learning and teaching.” Society for information technology & teacher education international conference. Vol. 2008. No. 1. 2008.