Speech and Gesture Multimodal Control of a Whole Earth 3D Visualization Environment. - David M. Krum; Olugbenga Omoteso; William Ribarsky; Thad Starner; Larry F. Hodges (VisSym, 2002)

Evaluation of a Multimodal Interface for 3D Terrain Visualization. - David M. Krum; Olugbenga Omoteso; William Ribarsky; Thad Starner; Larry F. Hodges (IEEE Visualization, 2002)