Continuous reference images for FTIR touch sensing. - Marc Alexa; Björn Bollensdorff; Ingo Bressler; Stefan Elstner; Uwe Hahne; Nino Kettlitz; Norbert Lindow; Robert Lubkoll; Ronald Richter; Claudia Stripf; Sebastian Szczepanski; Karl Wessel; et al. (SIGGRAPH Posters, 2008)

Multi-touch Focus+Context Sketch-based Interaction. - Uwe Hahne; Jonas Schild; Stefan Elstner; Marc Alexa (SBIM, 2009)