Schmidt, A., Strohbach, M., Van Laerhoven, K., & Gellersen, H.-W. (2002). Ubiquitous
Interaction - Using Surfaces in Everyday Environments as Pointing Devices. In N. Carbonell, & C. Stephanidis (Eds.), Universal Access Theoretical Perspectives, Practice, and Experience
(pp. 263-279). Berlin: Springer.