Gioan, Emeric, and Michel Las Vergnas. “The Active Bijection Between Regions and Simplices in Supersolvable Arrangements of Hyperplanes”. The Electronic Journal of Combinatorics 11, no. 2 (April 18, 2006): R30. Accessed March 28, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v11i2r30.