Farooq, H. and Zakaria, M.N. and Hassan, Mohd.F. and Sulaiman, S.  (2009) An approach to derive parametric L-system using genetic algorithm.  Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 5857 L.  pp. 455-466.  ISSN 03029743