BOUNDS ON THE VERTEX FOLKMAN NUMBER $F(4, 4; 5)$. Annual of Sofia University St. Kliment Ohridski. Faculty of Mathematics and Informatics, [S. l.], v. 96, p. 75–83, 2004. Disponível em: https://annual.uni-sofia.bg/index.php/fmi/article/view/162. Acesso em: 11 jan. 2026.