Donadelli, Jair, and Yoshiharu Kohayakawa. “A Density Result for Random Sparse Oriented Graphs and Its Relation to a Conjecture of Woodall”. The Electronic Journal of Combinatorics 9, no. 1 (November 16, 2002): #R45. Accessed May 29, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v9i1r45.