1. Palmer, S., Cooper, C., Thomas, K.: Creating a Balance: Managing Stress. British Library, London (2003)
2. Rodrigues, M., Fdez-Riverola, F., Novais, P.: Moodle and Affective Computing -Knowing Who’s on the Other Side. In: ECEL-2011 - 10th European Conference on Elearning, pp. 678–685 (2011)
3. Alzaghoul, A.F.: The implication of the learning theories on implementing e-learning courses. The Research Bulletin of Jordan 2(2), 27–30 (2012)
4. Hwang, K., Yang, C.: Automated Inattention and Fatigue Detection System in Distance Education for Elementary School Students. Journal of Educational Technology & Society 12, 22–35 (2009)
5. Lecture Notes in Computer Science;A. Pimenta,2013