Rabern, Landon. “The Borodin-Kostochka Conjecture for Graphs Containing a Doubly Critical Edge”. The Electronic Journal of Combinatorics 14, no. 1 (October 24, 2007): N22. Accessed March 28, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v14i1n22.