Wang, Shipeng, and Liming Xiong. “Forbidden Pairs for Traceability of 2-Connected Graphs”. The Electronic Journal of Combinatorics 32, no. 3 (July 4, 2025): P3.5. Accessed March 30, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v32i3p5.