摘要: … For the purpose of picture generation it is convenient to generalize L-systems even further by … This modification of L-systems seriously affects the notion of the direct derivation of words. …
Aristid Lindenmayer, Grzegorz Rozenberg, Automata, languages, developmentNorth-Holland Pub. Co. , sole distributors for U.S.A. and Canada, American Elsevier Pub. Co.. ,(1976)