1. Aittola, M., Ryhänen, T., Ojala, T., 2003. SmartLibrary—Location-aware mobile library service. In: Proceedings of the Fifth International Symposium on Human Computer Interaction with Mobile Devices and Services, Udine, Italy, pp. 411–416.
2. Arhippainen, L., Rantakokko, T., Tähti, M., 2004. Mobile feedback application for emotion and user experience collection. In: Proceedings of PROW 2004. Helsinki University Press, pp. 77–81.
3. Ark, W., Dryer, D.C., Lu, D.J., 1999. The emotion mouse. In: Proceedings of the HCI International 1999.
4. Battarbee, K., 2004. Co-experience. Understanding user experiences in interaction. Ph.D. Thesis. University of Art and Design Helsinki.
5. Beck, E., Christiansen, M., Kjeldskov, J., Kolve, N., Stage, J., 2003. Experimental evaluation of techniques for usability testing of mobile systems in a laboratory setting. In proceedings of Ozchi.