Xu X, Luo H, Shao Z. Upper and lower bounds for $F_v(4,4;5)$. Electron. J. Combin. [Internet]. 2010Oct.22 [cited 2026Mar.27];17(1):N34. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v17i1n34