Behague N, Kuperus A, Morrison N, Wright A. Improved Bounds for Cross-Sperner Systems. Electron. J. Combin. [Internet]. 2024Apr.5 [cited 2026May27];31(2):#P2.4. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v31i2p4