Zombori, Zsolt, and Péter Szeredi. “Loop Elimination, a Sound Optimisation Technique for PTTP Related Theorem Proving”. Acta Cybernetica 20, no. 3 (January 1, 2012): 441-458. Accessed April 19, 2024. https://cyber.bibl.u-szeged.hu/index.php/actcybern/article/view/3821.