Perry, M., O'hara, K., Sellen, A., Brown, B., and Harper, R. (2001). Dealing with mobility: understanding access anytime, anywhere. ACM Trans. Comput.-Hum. Interact. 8(4), pp. 323-347:They also talk about facets... connect with entry on facets.
"The rapid and accelerating move towards use of mobile technologies has increasingly provided people and organizations with the ability to work away from the office and on the move. The new ways of working afforded by these technologies are often characterized in terms of access to information and people anytime, anywhere. This article presents a study of mobile workers that highlights different facets of access to remote people and information, and different facets of anytime, anywhere. Four key factors in mobile work are identified: the role of planning, working in "dead time," accessing remote technological and informational resources, and monitoring the activities of remote colleagues. By reflecting on these issues, we can better understand the role of technology and artifacts in mobile work and identify the opportunities for the development of appropriate technological solutions to support mobile workers." [my bold]