Cabello, Sergio, and Primož Lukšič. “The Complexity of Obtaining a Distance-Balanced Graph”. The Electronic Journal of Combinatorics 18, no. 1 (February 28, 2011): P49. Accessed March 17, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v18i1p49.