Montejano LP, Ramírez-Alfonsín JL. Roudneff’s Conjecture for Lawrence Oriented Matroids. Electron. J. Combin. [Internet]. 2015Apr.14 [cited 2026Apr.17];22(2):#P2.3. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v22i2p3