Wei, Linsong, Yuqi Xu, Weihua Yang, and Yunxia Zhang. “A Characterization of $4$-Connected Graphs With No $ K_{3,3}+v $-Minor”. The Electronic Journal of Combinatorics 32, no. 3 (August 22, 2025): #P3.37. Accessed May 29, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v32i3p37.