Foley, Angèle M., Chính T. Hoàng, and Owen D. Merkel. “Classes of Graphs With $e$-Positive Chromatic Symmetric Function”. The Electronic Journal of Combinatorics 26, no. 3 (September 13, 2019): #P3.51. Accessed June 4, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v26i3p51.