Griggs J, Killian CE, Savage CD. Venn Diagrams and Symmetric Chain Decompositions in the Boolean Lattice . Electron. J. Combin. [Internet]. 2004Jan.2 [cited 2026Mar.28];11(1):R2. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v11i1r2