%0 Journal Article %A Đuro Kurepa %T Order Preserving or Increasing Mappings Freedom or Incomparability Preserving Mappings %J Publications de l'Institut Mathématique %D 1989 %P 17 %V _N_S_45 %N 59 %I mathdoc %U http://geodesic.mathdoc.fr/item/PIM_1989_N_S_45_59_a3/ %G en %F PIM_1989_N_S_45_59_a3