Hans-Jörg Kreowski, Sabine Kuske, Grzegorz Rozenberg. Graph Transformation Units - An Overview. In Pierpaolo Degano, Rocco De Nicola, José Meseguer, editors, Concurrency, Graphs and Models, Essays Dedicated to Ugo Montanari on the Occasion of His 65th Birthday. Volume 5065 of Lecture Notes in Computer Science, pages 57-75, Springer, 2008. [doi]
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