1. Boxer [a programming language]. See Plager, D. and diSessa, A., Boxer research: An annotated bibliography, The Boxer Group, Graduate School of Education, University of California at Berkeley, 1987.
2. Brasell, H.M., Effectiveness of the microcomputer-based laboratory in learning distance and velocity graphs, doctoral dissertation, University of Florida, 1986.
3. Bringuier, J. C., Conversations with Piaget, University of Chicago Press, Chicago, 1980.
4. Clement, J. & Lochhead, J., On hobgoblins and physics, University of Massachusetts, Amherst, 1979.
5. Excel [a graphing spreadsheet program], Microsoft.