DeMaio, Joe, and Bindia Mathew. “Which Chessboards Have a Closed Knight’s Tour Within the Rectangular Prism?”. The Electronic Journal of Combinatorics 18, no. 1 (January 5, 2011): P8. Accessed March 17, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v18i1p8.