Mykytsey, O.Ya., and K.M. Koporkh. “Compatibilities Between Continuous Semilattices”. Carpathian Mathematical Publications 13, no. 1 (January 4, 2021): 5–14. Accessed May 13, 2024. https://scijournals.pnu.edu.ua/index.php/cmp/article/view/4724.