Millani MG, Steiner R, Wiederrecht S. Colouring Non-Even Digraphs. Electron. J. Combin. [Internet]. 2022Oct.7 [cited 2026Mar.29];29(4):P4.9. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v29i4p9