%0 Journal Article %A Pasztor, Ana %T Extremal subobjects of complete posets %J Commentationes Mathematicae Universitatis Carolinae %D 1986 %P 229-234 %V 27 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1986__27_2_a2/ %G en %F CMUC_1986__27_2_a2