Nakamura, Masataka, and Kenji Kashiwabara. “The Prime Stems of Rooted Circuits of Closure Spaces and Minimum Implicational Bases”. The Electronic Journal of Combinatorics 20, no. 1 (January 29, 2013): P22. Accessed March 28, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v20i1p22.