Holmes, Mark, Alexander E. Holroyd, and Alejandro Ramírez. “Cyclic Products and Optimal Traps in Cyclic Birth and Death Chains”. The Electronic Journal of Combinatorics 30, no. 2 (June 30, 2023): P2.52. Accessed March 27, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v30i2p52.