%0 Journal Article %A Sapák, Oldřich %T Representation of the finite directed acyclic graph %J Archivum mathematicum %D 1977 %P 111-116 %V 13 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/ARM_1977__13_2_a6/ %G en %F ARM_1977__13_2_a6