ON THE VERTEX FOLKMAN NUMBERS $F_v(\underbrace{2,...,2}_R;R-1)$ and $F_v(\underbrace{2,...,2}_R;R-2)$. (2013). Annual of Sofia University St. Kliment Ohridski. Faculty of Mathematics and Informatics, 101, 5-17. https://annual.uni-sofia.bg/index.php/fmi/article/view/226