%0 Journal Article %A Stefan BaraƄczuk %T Height Functions for Groups of $S$-units of Number Fields and Reductions Modulo Prime Ideals %J Bulletin of the Polish Academy of Sciences. Mathematics %D 2015 %P 25-31 %V 63 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ba63-1-4/ %R 10.4064/ba63-1-4 %G en %F 10_4064_ba63_1_4