Brittenham, Charles, Andrew T. Carroll, T. Kyle Petersen, and Connor Thomas. “Unimodality via Alternating Gamma Vectors”. The Electronic Journal of Combinatorics 23, no. 2 (May 27, 2016): #P2.40. Accessed May 15, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v23i2p40.