1. M. Alfonseca, A. Ortega: Representation of Some Cellular Automata by Means of Equivalent L Systems. Complexity International, 7 (2000), http://www.complexity.org.au/ci/vol07/alfons01.
2. LNCS;D. Besozzi,2004
3. J. Dassow, Gh. Păun: Regulated Rewriting in Formal Language Theory. Springer, Berlin, 1989.
4. LNCS;R. Freund,2001
5. A. Georgiou: Sub-LP Systems — A Computational Model for Plant Simulation. MSc Dissertation, University of Sheffield, 2003.