TY  - JOUR
AU  - Leon Greenberg
TI  - Discrete Subgroups of the Lorentz Group.
JO  - Mathematica Scandinavica
PY  - 1962
SP  - 85
EP  - 107
VL  - 10
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MS2_1962__10_165791/
ID  - MS2_1962__10_165791
ER  -