Ésik, Zoltán, and Werner Kuich. “Continuous Semiring-Semimodule Pairs and Mixed Algebraic Systems”. Acta Cybernetica 23, no. 1 (January 1, 2017): 061-079. Accessed March 29, 2024. https://cyber.bibl.u-szeged.hu/index.php/actcybern/article/view/3915.