Boutin, J. P., E. Duchêne, B. Effantin, H. Kheddouci, and H. Seba. “New Results about Set Colorings of Graphs”. The Electronic Journal of Combinatorics 17, no. 1 (December 10, 2010): R173. Accessed March 27, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v17i1r173.