Xu, Hong, Cheng Cheng, Sven Koenig, and T. K. Kumar. “Message Passing Algorithms for Semiring-Based and Valued Constraint Satisfaction Problems”. Proceedings of the International Symposium on Combinatorial Search 9, no. 1 (September 1, 2021): 115–123. Accessed May 26, 2026. https://ojs.aaai.org/index.php/SOCS/article/view/18453.