Avgustinovich S, Kitaev S, Taranenko A. On Five Types of Crucial Permutations with Respect to Monotone Patterns. Electron. J. Combin. [Internet]. 2023Feb.24 [cited 2026Mar.27];30(1):P1.40. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v30i1p40