The following publications are possibly variants of this publication:
- Non-returning PC Grammar Systems Generate any Recursively Enumerable Language with Eight Context-Free ComponentsGyörgy Vaszil. jalc, 12(1-2):307-315, 2007.
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- Grammar Systems as Language Analyzers and Recursively Enumerable LanguagesHenning Bordihn, Jürgen Dassow, György Vaszil. fct 1999: 136-147 [doi]
- Pc Grammar Systems with Clusters of ComponentsErzsébet Csuhaj-Varjú, Marion Oswald, György Vaszil. ijfcs, 22(1):203-212, 2011. [doi]