1. Betiol A, Cybis AW (2005) Usability testing of mobile devices: a comparison of three approaches. In: Proceedings of interact 2005. Springer, Berlin, pp 470–481
2. Chervest K, Mitchell K, Davies N (2002) The role of adaptive hypermedia in a context-aware tourist guide. Commun ACM-The Adapt Web 45(5):47–51
3. Delikostidis I, van Elzakker CPJM (2009) Geo-identification and pedestrian navigation with geo-mobile applications: how do users proceed? In: Proceedings of the 5th international conference on location based services and telecartography. Springer, Berlin, pp 185–206
4. Duh HBL, Tan CBG, Chen VHH (2006) Usability evaluation for mobile device: a comparison of laboratory and field tests. In: Proceedings of mobile HCI ’06. ACM, New York, pp 181–186
5. Goodman J, Brewster S, Gray P (2004) Using field experiments to evaluate mobile guides. In: Proceedings of HCI in mobile guides, workshop at mobile HCI 2004. Springer, Glaskow, pp 38–48