1.
Ayyer A, Bényi B. Toppling on Permutations with an Extra Chip. Electron. J. Combin. [Internet]. 2021Nov.5 [cited 2026Mar.17];28(4):P4.18. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v28i4p18