Andrzej Ehrenfeucht, Jetty Kleijn, Maciej Koutny, Grzegorz Rozenberg. Relevance of Entities in Reaction Systems. In Henning Bordihn, Martin Kutrib, Bianca Truthe, editors, Languages Alive - Essays Dedicated to Jürgen Dassow on the Occasion of His 65th Birthday. Volume 7300 of Lecture Notes in Computer Science, pages 44-55, Springer, 2012. [doi]
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