R. Freund, Gh. Paun, G. Rozenberg:
"Contextual Array Grammars";
in: "Formal Models, Languages and Applications", K. Subramanian et al. (ed.); World Scientific, Singapore, 2006, ISBN: 981-256-889-1, 112 - 136.
http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC06587149