1.
Patkós B. Families that Remain $k$-Sperner Even After Omitting an Element of their Ground Set. Electron. J. Combin. [Internet]. 2013Feb.12 [cited 2026Mar.27];20(1):P32. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v20i1p32