Feder E, Garber D. On the Orchard Crossing Number of the Complete Bipartite Graphs $K_{n,n}$. Electron. J. Combin. [Internet]. 2011Oct.10 [cited 2026Mar.17];18(1):P201. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v18i1p201