@article{10_4064__26_2_269_287, author = {Frank D. Grosshans}, title = {Constructive geometric invariant theory for certain nonreductive groups}, journal = {Banach Center Publications}, pages = {269--287}, publisher = {mathdoc}, volume = {26}, number = {2}, year = {1990}, doi = {10.4064/-26-2-269-287}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/-26-2-269-287/} }