Breuer F. Ehrhart $f^*$-Coefficients of Polytopal Complexes are Non-negative Integers. Electron. J. Combin. [Internet]. 2012Nov.1 [cited 2026Mar.17];19(4):P16. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v19i4p16