Rui, Zhang, and Sun Yongqi. “The Bipartite Ramsey Numbers $b(C_{2m};K_{2,2})$”. The Electronic Journal of Combinatorics 18, no. 1 (February 28, 2011): #P51. Accessed May 9, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v18i1p51.