[[File:KarperienFractalBranch.jpg|200px|thumb|upright=3|用 L 系统原理在硅树脂中模拟自相似分支模式 |right]]
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[[File:KarperienFractalBranch.jpg|200px|thumb|upright=3|用 L 系统原理在硅树脂中模拟自相似分支模式 <ref name="branching">{{Cite book |editor=Sarker, Ruhul |title=Workshop proceedings: the Sixth Australia-Japan Joint Workshop on Intelligent and Evolutionary Systems, University House, ANU |oclc=224846454|chapter=MicroMod-an L-systems approach to neural modelling |last1=Jelinek |first1=Herbert F. |last2=Karperien |first2=Audrey |last3=Cornforth |first3=David |last4=Cesar |first4=Roberto |last5=Leandro |first5=Jorge de Jesus Gomes |url=https://books.google.com/books?id=FFSUGQAACAAJ |accessdate=February 3, 2012 |year=2002 |publisher=University of New South Wales |isbn=9780731705054 |quote=Event location: Canberra, Australia}}</ref>|right]]