Eriko Tamaru, Kimitake Hasuike, Mikio Tozaki. Cellular Phone as a Collaboration Tool that Empowers and Changes the Way of Mobile Work: Focus on Three Fields of Work. In Hans Gellersen, Kjeld Schmidt, Michel Beaudouin-Lafon, Wendy E. Mackay, editors, Proceedings of the Ninth European Conference on Computer Supported Cooperative Work, 18-22 September 2005, Paris, France. pages 247-266, Springer, 2005. [doi]