The definitive resource for Scheme on the net. Includes a large catalog of implementations, useful source code, and documents, many of which you won't find anywhere else.
Home page for the AAAI Press book, edited by David Leake. Includes the table of contents and a link to an on-line version of the chapter "CBR in Context: The Present and Future, " a tutorial and overview of case-based reasoning research and applications.
A paper by Daniel P. Friedman (1994) which provides a good introduction to Scheme programming. Presented at the First International Forum on Computer Programming in Education, ITESM, Mexico.