L Systems

@inproceedings{Kari1997LS,
  title={L Systems},
  author={Lila Kari and Grzegorz Rozenberg and Arto Salomaa},
  booktitle={Handbook of Formal Languages},
  year={1997}
}
L systems are parallel rewriting systems which were originally introduced in 1968 to model the development of multicellular organisms, [L1]. The basic ideas gave rise to an abundance of language-theoretic problems, both mathematically challenging and interesting from the point of view of diverse applications. After an exceptionally vigorous initial research period (roughly up to 1975; in the book [RSed2], published in 1985, the period up to 1975 is referred to, [RS2], as \when L was young… 
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