1.
Zeilberger D. The Umbral Transfer-Matrix Method. IV. Counting Self-Avoiding Polygons and Walks. Electron. J. Combin. [Internet]. 2001Jul.26 [cited 2026Jun.3];8(1):#R28. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v8i1r28