Multimodal desktop interaction: The face - object - gesture - voice example. - Nikolas Vidakis; Anastasios Vlasopoulos; Tsampikos Kounalakis; Petros Varchalamas; Michalis Dimitriou; Gregory Kalliatakis; Efthimios Syntychakis; John Christofakis; Georgios A. Triantafyllidis (DSP, 2013)