TY - JOUR AU - CiemaƂa, Marzena TI - Natural homomorphisms of Witt rings of orders in algebraic number fields JO - Mathematica slovaca PY - 2004 SP - 473 EP - 477 VL - 54 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MASLO_2004__54_5_a4/ LA - en ID - MASLO_2004__54_5_a4 ER -