Anholcer, Marcin, Bartłomiej Bosek, and Jarosław Grytczuk. “Majority Choosability of Digraphs”. The Electronic Journal of Combinatorics 24, no. 3 (September 22, 2017): P3.57. Accessed March 16, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v24i3p57.