Bruggink, H. J. Sander, and Mathias Hülsbusch. “Decidability and Expressiveness of Finitely Representable Recognizable Graph Languages”. Electronic Communications of the EASST 41 (May 16, 2011). Accessed March 19, 2026. https://www.eceasst.org/index.php/eceasst/article/view/1803.