%0 Journal Article %A Halaš, Radomír %T Decompositions of directed sets with zero %J Mathematica slovaca %D 1995 %P 9-17 %V 45 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_1995__45_1_a1/ %G en %F MASLO_1995__45_1_a1