A Calibration-Free Head Gesture Recognition System with Online Capability. - Nils-Christian Wöhler; Ulf Grossekathofer; Angelika Dierker; Marc Hanheide; Stefan Kopp; Thomas Hermann 001 (ICPR, 2010)

On-the-fly behavior coordination for interactive virtual agents: a model for learning, recognizing and reproducing hand-arm gestures online. - Ulf Großekathöfer; Nils-Christian Wöhler; Thomas Hermann 001; Stefan Kopp (AAMAS, 2012)