Bang-Jensen, Jørgen, Thomas Bellitto, Thomas Schweser, and Michael Stiebitz. “Hajós and Ore Constructions for Digraphs”. The Electronic Journal of Combinatorics 27, no. 1 (March 20, 2020): P1.63. Accessed March 17, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v27i1p63.