Greenhill, Catherine. “A Polynomial Bound on the Mixing Time of a Markov Chain for Sampling Regular Directed Graphs”. The Electronic Journal of Combinatorics 18, no. 1 (December 19, 2011): #P234. Accessed May 23, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v18i1p234.