TY  - JOUR
AU  - H. Schwerdtfeger
TI  - Invariants of a class of transformation groups. (Short Communication).
JO  - Aequationes mathematicae
PY  - 1975
SP  - 318
EP  - 319
VL  - 12
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1975__12_136520/
ID  - AM2_1975__12_136520
ER  -