1. Ahlberg, C., Shneiderman, B. (1994). Visual information seeking: Tight coupling of dynamic query filters with starfield displays. In Human factors in computing systems. Conference proceedings CHI’94 (pp. 313–317).
2. Spotfire: An information exploration environment;Ahlberg;ACM SIGMOD,1996
3. Evaluating animations as student aids in learning computer algorithms;Byrne;Computers and Education,1999
4. CalEd Software (2007). Class action gradebook. .
5. Champion, J. (2007) Zedgraph. .