Brak R, Essam JW. Bicoloured Dyck Paths and the Contact Polynomial for $n$ Non-Intersecting Paths in a Half-Plane Lattice. Electron. J. Combin. [Internet]. 2003Sep.12 [cited 2026Mar.27];10(1):R35. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v10i1r35