%0 Journal Article %A Claus Michael Ringel %T The Rational Invariants of the Tame Quivers. %J Inventiones mathematicae %D 1980 %P 217-240 %V 58 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1980__58_142722/ %F IM_1980__58_142722