First published in the proceedings of Japan Lisp User Group Meeting (JLUGM) 2000, Tokyo, May 2000.
First published in the proceedings of Game Developers Conference 2002, San Jose, March 19-23, 2002.
A paper presented at the International Lisp Conference 2002, San Francisco, October, 2002.
A paper presented at the International Lisp Conference 2003, New York, October, 2003.