Dányi, Gábor. “On Domain and Range Tree Languages of Superlinear Deterministic Top-down Tree Transformations”. Acta Cybernetica 12, no. 3 (January 1, 1996): 261-277. Accessed April 20, 2024. https://cyber.bibl.u-szeged.hu/index.php/actcybern/article/view/3461.