1. Robertson, G.G., Mackinlay, J.D. and Card, S.K. 1991. Cone Trees: Animated 3D visualizations of hierarchical information. Proc. ACM-SIGCHI1991 Human Factors in Computing Systems, 189–194.
2. Fairchild, K.M. and Poltrock, S. 1987. Soaring through Knowledge Space: SemNet 2.1 [Videotape]. ACM-SIG-CHI1987 Human Factors in Computing Systems and in MCC Technical Report No. HI-104-86 Rev 1, Austin, TX.
3. The Magical Number 7 Plus Or Minus 2: Some limits in our capacity for processing information;Miller;Psychological Review,1956
4. Furnas, G.W. 1986. Generalized fisheye views. Proc. CHI1986 Human Factors in Computing Systems, 16–23.
5. Fairchild, K.M., Meredith, L.G. and Wexelblat, A. 1989. A Formal Structure for Automatic Icons. Interacting with Computers, June 89 and in MCC Technical Report No. STP-311-88.