On the 2-coloring diagonal vertex Folkman numbers with minimal possible clique number. Annual of Sofia University St. Kliment Ohridski. Faculty of Mathematics and Informatics, [S. l.], v. 98, p. 101–126, 2008. Disponível em: https://annual.uni-sofia.bg/index.php/fmi/article/view/132. Acesso em: 14 dec. 2025.