TY - JOUR AU - Đuro Kurepa TI - Order Preserving or Increasing Mappings Freedom or Incomparability Preserving Mappings JO - Publications de l'Institut Mathématique PY - 1989 SP - 17 VL - _N_S_45 IS - 59 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/PIM_1989_N_S_45_59_a3/ LA - en ID - PIM_1989_N_S_45_59_a3 ER -