Leena Norros, Hanna Koskinen, Leena Salo, Paula Savioja: ECCE 2009 - Designing beyond the Product - Understanding Activity and User Experience in Ubiquitous Environments, European Conference on Cognitive Ergonomics 2009, Helsinki, Finland, September 30 - October 2, 2009. VTT Technical Research Centre of Finland / ACM 2009, ISBN 978-951-38-6340-1