Xu, Xiaodong, Meilian Liang, and Stanisław P. Radziszowski. “Chromatic Vertex Folkman Numbers”. The Electronic Journal of Combinatorics 27, no. 3 (September 4, 2020): P3.53. Accessed March 27, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v27i3p53.