David S, Spink H, Tiba M. Symmetric Chain Decompositions of Products of Posets with Long Chains. Electron. J. Combin. [Internet]. 2018Mar.29 [cited 2026Mar.15];25(1):P1.69. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v25i1p69