%0 Journal Article %A Herbert Abels %A Ernest B. Vinberg %T Subsemigroups of Nilpotent Lie Groups %J Journal of Lie Theory %D 2020 %P 171-178 %V 30 %N 1 %U http://geodesic.mathdoc.fr/item/JOLT_2020_30_1_a9/ %F JOLT_2020_30_1_a9