Fischer, Ilse, and Matjaž Konvalinka. “A Bijective Proof of the ASM Theorem, Part I: The Operator Formula”. The Electronic Journal of Combinatorics 27, no. 3 (August 21, 2020): P3.35. Accessed March 28, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v27i3p35.