%0 Journal Article %A J. Winkelmann %T A Splitting Criterion for Two-Dimensional Semi-Tori %J Journal of Lie theory %D 2004 %P 555-561 %V 14 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/JLT_2004_14_2_JLT_2004_14_2_a12/ %F JLT_2004_14_2_JLT_2004_14_2_a12