J. L. Hidalgo Emilio Camahort Francisco Abad Maria J. Vicent Procedural Graphics Model and Behavior Generation. 106-115 2008 ICCS (2) http://dx.doi.org/10.1007/978-3-540-69387-1_12 conf/iccS/2008-2 db/conf/iccS/iccS2008-2.html#HidalgoCAV08