Mitchell L, Yengulalp L. Sphere Representations, Stacked Polytopes, and the Colin de Verdière Number of a Graph. Electron. J. Combin. [Internet]. 2016Jan.22 [cited 2026Mar.29];23(1):P1.9. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v23i1p9