H. Abelson, G. Sussman, und with~Julie~Sussman. MIT Press/McGraw-Hill, Cambridge, 2nd~Editon Edition, (1996)http://www.csie.ncnu.edu.tw/~klim/lisp-922/scheme.pdf
http://mitpress.mit.edu/sicp/full-text/book/book-Z-H-1.html
-- last visited $26^th$ December 2007.