LOWER BOUNDING THE FOLKMAN NUMBERS $F_v(a_1, . . . , a_s;m − 1)$. Annual of Sofia University St. Kliment Ohridski. Faculty of Mathematics and Informatics, [S. l.], v. 104, p. 39–53, 2017. Disponível em: https://annual.uni-sofia.bg/index.php/fmi/article/view/36. Acesso em: 4 feb. 2026.