1. Daylighting: Performance and Design;Ander,1995
2. Harold: a world made of drawings;Cohen,2000
3. VR Sketchpad—create instant 3D worlds by sketching on a transparent window;Do,2001
4. Space Series: a focus+context technique for displaying spatial and temporal data;Glaser,1999
5. Space Pen: annotation and sketching on 3D models on the Internet;Jung,2001