Graph Grammars as a Tool for Description in Computer Processed Control: A Case Study. - Bernd Mahr; Anne Wilharm (WG, 1982)

Is parallelism already concurrency? Part 2: Non-sequential processes in graph grammars. - Hans-Jörg Kreowski; Anne Wilharm (Graph-Grammars and Their Application to Computer Science, 1986)

Net Processes Correspond to Derivation Processes in Graph Grammars. - Hans-Jörg Kreowski; Anne Wilharm (Theor. Comput. Sci., 1986)