Sawada, Joe, and Roy Li. “Stamp Foldings, Semi-Meanders, and Open Meanders: Fast Generation Algorithms”. The Electronic Journal of Combinatorics 19, no. 2 (June 13, 2012): P43. Accessed March 30, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v19i2p43.