TY  - JOUR
AU  - K.H. Neeb
TI  - Semigroups in the universal covering of SL(2).
JO  - Semigroup forum
PY  - 1991
SP  - 33
EP  - 44
VL  - 43
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1991__43_3_135093/
ID  - SF_1991__43_3_135093
ER  -