Marcella Anselmo Dora Giammarresi Maria Madonia Tiling Automaton: A Computational Model for Recognizable Two-Dimensional Languages. 290-302 2007 conf/wia/2007 CIAA http://dx.doi.org/10.1007/978-3-540-76336-9_27 db/conf/wia/ciaa2007.html#AnselmoGM07