R. Findler, C. Flanagan, M. Flatt, S. Krishnamurthi, and M. Felleisen. Proceedings of the 1997 Symposium on Programming
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Southampton, UK, 1292, page 369-. Berlin, Heidelberg, Springer, (September 1997)
M. Felleisen, R. Findler, M. Flatt, and S. Krishnamurthi. The MIT Press, Cambridge, Massachusetts London, England, (2001)MIT -- Massachusetts Institute of Technology --
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22.~September~2002:
http://www.htdp.org/2002-09-22/Book/curriculum.html
-- last visited $19^th$~June~2008.
P. Graunke, R. Findler, S. Krishnamurthi, and M. Felleisen. Proceedings of the 12th European Symposium on Programming, volume 2618 of Lecture Notes in Computer Science, page 238-252. Warsaw, Poland, Springer-Verlag, (April 2003)