Steingartner, William, Valerie Novitzka, and Wolfgang Schreiner. “Coalgebraic Operational Semantics for an Imperative Language”. Computing and Informatics 38, no. 5 (February 11, 2020): 1181–1209. Accessed April 30, 2025. https://www.cai.sk/ojs/index.php/cai/article/view/2019_5_1181.