TY - JOUR AU - Kovář, Tomáš TI - On (weak) zero-fixing isometries in dually residuated lattice ordered semigroups JO - Mathematica slovaca PY - 2000 SP - 123 EP - 125 VL - 50 IS - 2 UR - http://geodesic.mathdoc.fr/item/MASLO_2000_50_2_a1/ LA - en ID - MASLO_2000_50_2_a1 ER -