1. Human Interface Guidelines;Apple computer,1987
2. “Visualization in the natural environment: a look forward”;Bishop;Landscape and Urban Planning,1992
3. PHIGS and PHIGS+, an Introduction to Three-dimensional Computer Graphics;Blake,1992
4. “Animation and the role of map design in scientific visualization”;DiBiase;Cartography and Geographic Information Systems,1992
5. “Landscape visualization with Emaps”;Ervin;IEEE Computer Graphics and Applications,1993