Gombás, Éva, and Miklós Bartha. “Two Transformations on Attribute Grammars Improving the Complexity of Their Evaluation”. Acta Cybernetica 9, no. 1 (January 1, 1989): 55-72. Accessed May 2, 2024. https://cyber.bibl.u-szeged.hu/index.php/actcybern/article/view/3355.