Araujo-Pardo G, Montellano-Ballesteros JJ, Olsen M, Rubio-Montiel C. The Diachromatic Number of Digraphs. Electron. J. Combin. [Internet]. 2018Sep.21 [cited 2026Mar.16];25(3):P3.51. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v25i3p51