Jurrius, Relinde, and Ruud Pellikaan. “Defining the $q$-Analogue of a Matroid”. The Electronic Journal of Combinatorics 25, no. 3 (July 13, 2018): P3.2. Accessed April 4, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v25i3p2.