1. G. D. Abowd et al. Towards a better understanding of context and context-awareness.Handheld and ubiquitous computing, 1999.
2. J. Bartley, J. Forsyth, P. Pendse, D. Xin, G. Brown, P. Hagseth, A. Agarwal, D. W. Goldberg, and T. Hammond. World of workout.HealthGIS '13: Proceedings of the Second ACM SIGSPATIAL International Workshop on the Use of GIS in Public Health / ACM.
3. S. Consolvo, K. Everitt, I. Smith, and J. A. Landay.Design Requirements for Technologies that Encourage Physical Activity.
4. D. Cummings, G. Lucchese, M. Prasad, C. Aikens, J. Ho, and T. Hammond. Geotrooper: a mobile location-aware system for team coordination.Proceedings of the 13th International Conference of the NZ Chapter of the ACM's Special Interest Group on Human-Computer Interaction.
5. A. K. Dey, G. D. Abowd, and D. Salber. A conceptual framework and a toolkit for supporting the rapid prototyping of context-aware applications.Human-Computer interaction, 16(2): 97--166, 2001.