%0 Journal Article %A Kerner Otto %T Universal exact sequences for torsion theories %J Banach Center Publications %D 1990 %P 317-326 %V 26 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/-26-1-317-326/ %R 10.4064/-26-1-317-326 %G en %F 10_4064__26_1_317_326