Kim, Jaehoon, and Sang-il Oum. “The Erdős-Hajnal Property for Graphs With No Fixed Cycle As a Pivot-Minor”. The Electronic Journal of Combinatorics 28, no. 2 (April 9, 2021): P2.9. Accessed March 27, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v28i2p9.