Brignall, Robert, and Daniel Cocks. “Uncountably Many Minimal Hereditary Classes of Graphs of Unbounded Clique-Width”. The Electronic Journal of Combinatorics 29, no. 1 (March 25, 2022): P1.63. Accessed March 27, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v29i1p63.