1.
Ciucu M. A Short Conceptual Proof of Narayana’s Path-Counting Formula. Electron. J. Combin. [Internet]. 2016Oct.14 [cited 2026Mar.28];23(4):P4.11. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v23i4p11