Henze, Matthias. “On Counterexamples to a Conjecture of Wills and Ehrhart Polynomials Whose Roots Have Equal Real Parts”. The Electronic Journal of Combinatorics 21, no. 1 (February 7, 2014): #P1.28. Accessed May 28, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v21i1p28.