Jelínek, Vít, Nelson Y. Li, Toufik Mansour, and Sherry H. F. Yan. “Matchings Avoiding Partial Patterns and Lattice Paths”. The Electronic Journal of Combinatorics 13, no. 1 (October 19, 2006): R89. Accessed March 15, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v13i1r89.