Dais DI. On the Twelve-Point Theorem for $\ell$-Reflexive Polygons. Electron. J. Combin. [Internet]. 2019Nov.8 [cited 2026Mar.17];26(4):P4.29. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v26i4p29