TY - JOUR AU - K.-H. Neeb AU - D. Mittenhuber TI - On the Exponential Function of an Invariant Lie Semigroup JO - Journal of Lie theory PY - 1992 SP - 021 EP - 03 VL - 2 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/JLT_1992_2_1_a2/ ID - JLT_1992_2_1_a2 ER -