Nenov, Nedyalko. “BOUNDS ON THE VERTEX FOLKMAN NUMBER $F(4, 4; 5)$”. Ann. Sofia Univ. Fac. Math. and Inf. 96 (December 12, 2004): 75–83. Accessed November 22, 2024. https://annual.uni-sofia.bg/index.php/fmi/article/view/162.