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@article{AM2_1978__17_136746, author = {H. Schwerdtfeger}, title = {Invariants of a class of transformation groups {II.}}, journal = {Aequationes mathematicae}, pages = {292--294}, publisher = {mathdoc}, volume = {17}, year = {1978}, zbl = {0393.39006}, url = {http://geodesic.mathdoc.fr/item/AM2_1978__17_136746/} }
H. Schwerdtfeger. Invariants of a class of transformation groups II.. Aequationes mathematicae, Tome 17 (1978), pp. 292-294. http://geodesic.mathdoc.fr/item/AM2_1978__17_136746/