%0 Journal Article %A Rachůnek, Jiří %T The ordinal variety of distributive ordered sets of width two %J Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica %D 1991 %P 17-32 %V 30 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/AUPO_1991__30_1_a1/ %G en %F AUPO_1991__30_1_a1