Mossakowski, Till, Anne E. Haxthausen, Donald Sannella, and Andrzej Tarlecki. “CASL - The Common Algebraic Specification Language: Semantics and Proof Theory”. Computing and Informatics 22, no. 3-4 (February 20, 2012): 285–321. Accessed May 1, 2025. https://www.cai.sk/ojs/index.php/cai/article/view/458.