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@article{MS2_1974__34_166350, author = {Arne Hole}, title = {Invariant {Differential} {Operators} and {Polynomials} of {Lie} {Transformation} {Groups.}}, journal = {Mathematica Scandinavica}, pages = {109--123}, publisher = {mathdoc}, volume = {34}, year = {1974}, zbl = {0287.58008}, url = {http://geodesic.mathdoc.fr/item/MS2_1974__34_166350/} }
Arne Hole. Invariant Differential Operators and Polynomials of Lie Transformation Groups.. Mathematica Scandinavica, Tome 34 (1974), pp. 109-123. http://geodesic.mathdoc.fr/item/MS2_1974__34_166350/