1. Abowd, G.D., Dey, A.K., Brown, P.J., Davies, N., Smith, M., Steggles, P.: Towards a better understanding of context and context-awareness. In: Handheld and Ubiquitous Computing, pp. 304–307. Springer (1999)
2. Adomavicius, G., Tuzhilin, A.: Context-aware recommender systems. In: Recommender Systems Handbook, pp. 217–253. Springer (2011)
3. Adomavicius, G., Mobasher, B., Ricci, F., Tuzhilin, A.: Context-aware recommender systems. AI Mag. 32(3), 67–80 (2011)
4. Arroyo, I., Cooper, D.G., Burleson, W., Woolf, B.P., Muldner, K., Christopherson, R.: Emotion sensors go to school. Int. Conf. Artif. Intell. Educ. 200, 17–24 (2009)
5. Baltrunas, L., Amatriain, X.: Towards time-dependant recommendation based on implicit feedback. In: ACM RecSys’ 09, Proceedings of the 4th International Workshop on Context-Aware Recommender Systems (2009)