1. Russell JA (1989) Measures of emotion. Emotion: theory, research, and experience, vol 4. Academic Press, pp 83–111
2. Bransford JD, Brown AL, Cocking RR (2000) How people learn: brain, mind, experience and school. National Academy Press, Washington, DC
3. Picard RW, Papert S, Bender W et al (2004) Affective learning-a manifesto. BT Technol J 22(4):253–269
4. Luo X, Spaniol M, Wang L, Li Q, Nejdl W, Zhang W (eds) (2010) Advances in web-based learning—ICWL 2010–9th International Conference, Shanghai, December 8–10, 2010. Proceedings Lecture Notes in Computer Science 6483, Springer, ISBN 978-3-642-17406-3
5. Beverly W, Burleson W, Arroyo I et al (2009) Affect-aware tutors: recognising and responding to student affect. Int J Learn Technol 4(3):129–164