Martin, Nigel, and Richard Stong. “Permutation Separations and Complete Bipartite Factorisations of $K_{n,n}$”. The Electronic Journal of Combinatorics 10, no. 1 (September 17, 2003): #R37. Accessed May 30, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v10i1r37.