%0 Journal Article %A Xiaodong Xu %A Meilian Liang %A Stanisław P. Radziszowski %T Chromatic vertex Folkman numbers %J The electronic journal of combinatorics %D 2020 %V 27 %N 3 %U http://geodesic.mathdoc.fr/articles/10.37236/7862/ %R 10.37236/7862 %F 10_37236_7862