%0 Journal Article %A Nesetril, Jaroslav %A Tardif, Claude %T On maximal finite antichains in the homomorphism order of directed graphs %J Discussiones Mathematicae. Graph Theory %D 2003 %P 325-332 %V 23 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DMGT_2003_23_2_a8/ %G en %F DMGT_2003_23_2_a8