Banakh, T., O. Verbitsky, and Ya. Vorobets. “A Ramsey Treatment of Symmetry ”. The Electronic Journal of Combinatorics 7, no. 1 (August 15, 2000): R52. Accessed March 16, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v7i1r52.