%0 Journal Article %A CiemaƂa, Marzena %T Natural homomorphisms of Witt rings of orders in algebraic number fields %J Mathematica slovaca %D 2004 %P 473-477 %V 54 %N 5 %U http://geodesic.mathdoc.fr/item/MASLO_2004_54_5_a4/ %G en %F MASLO_2004_54_5_a4