Dvořák, Vojtěch. “A Note on Norine’s Antipodal-Colouring Conjecture”. The Electronic Journal of Combinatorics 27, no. 2 (May 19, 2020): P2.26. Accessed April 1, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v27i2p26.