Truthe, Bianca. “On the Finiteness of Picture Languages of Synchronous Deterministic Chain Code Picture Systems”. Acta Cybernetica 17, no. 1 (January 1, 2005): 53-73. Accessed November 24, 2024. https://cyber.bibl.u-szeged.hu/index.php/actcybern/article/view/3654.