1.
Allison TF, Godbole AP, Hawley KM, Kay B. Covering n-Permutations with (n+1)-Permutations. Electron. J. Combin. [Internet]. 2013Jan.14 [cited 2026Mar.28];20(1):P6. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v20i1p6