# Bibliography

[FK93]

  Klaus Fischer and Norbert Kuhn. A DAI approach to modeling the transportation domain. Research Report RR-93-25, Deutsches Forschungszentrum für Künstliche Intelligenz, Stuhlsatzenhausweg 3, D-66123 Saarbrücken, Germany, 1993.

[Pee95]

  Jerry Peek. MH and xmh: Email for Users and Programmers. O'Reilly and Associates, April 1995. Electronic version available at http://www.ics.uci.edu/ mh/book/.

[PL90]

  Przemyslaw Prusinkiewicz and Aristid Lindenmayer. The Algorithmic Beauty of Plants. Springer-Verlag, New York-Heidelberg-Berlin, 1990.