Nelson, Peter, and Sergey Norin. “The Smallest Matroids With No Large Independent Flat”. The Electronic Journal of Combinatorics 28, no. 1 (February 12, 2021): P1.31. Accessed March 17, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v28i1p31.