“COMPUTATION OF THE VERTEX FOLKMAN NUMBERS $F(2, 2, 2, 3; 5)$ AND $F(2, 3, 3; 5)$”. Annual of Sofia University St. Kliment Ohridski. Faculty of Mathematics and Informatics, vol. 95, Dec. 2003, pp. 71-82, https://annual.uni-sofia.bg/index.php/fmi/article/view/177.