Fabian Hemmert, Susann Hamann, Reto Wettach. The digital hourglass. In Nicolas Villar, Shahram Izadi, Mike Fraser, Steve Benford, editors, Proceedings of the 3rd International Conference on Tangible and Embedded Interaction 2009, Cambridge, UK, February 16-18, 2009. pages 19-20, ACM, 2009. [doi]
Abstract is missing.