De Winter, Stefaan, Jeroen Schillewaert, and Jacques Verstraete. “Large Incidence-Free Sets in Geometries”. The Electronic Journal of Combinatorics 19, no. 4 (November 8, 2012): P24. Accessed March 17, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v19i4p24.