“An example of a 16-vertex Folkman edge (3,4)-graph without 8-cliques”, Ann. Sofia Univ. Fac. Math. and Inf., vol. 98, pp. 127–141, Dec. 2008, Accessed: Jan. 11, 2026. [Online]. Available: https://annual.uni-sofia.bg/index.php/fmi/article/view/133