1. How fast is technology evolving?;Arthur;Scientific American,1997
2. Bush, V., 1945. As we may think. Atlantic Monthly, July, 121–128.
3. The Internet - A catalyst for change;Butler;Computers & Geosciences,1998
4. You show me yours and I'll show you mine;Butler;GSA Today,1998
5. Butler, J.C., 1999. The tangled web. Active Learning, in press.