Bal, Deepak, and Patrick Bennett. “The Bipartite $K_{2,2}$-Free Process and Bipartite Ramsey Number $b(2, t)$”. The Electronic Journal of Combinatorics 27, no. 4 (October 30, 2020): #P4.23. Accessed April 24, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v27i4p23.