%0 Journal Article %A Zelinka, Bohdan %T Small directed graphs as neighbourhood graphs %J Czechoslovak Mathematical Journal %D 1988 %P 269-273 %V 38 %N 2 %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1988.102221/ %R 10.21136/CMJ.1988.102221 %G en %F 10_21136_CMJ_1988_102221