@article{MM2_1988__62_3_155341,
     author = {Frank D. Grosshans},
     title = {Separeted orbits for certain non-reductive subgroups.},
     journal = {Manuscripta mathematica},
     pages = {205--218},
     publisher = {mathdoc},
     volume = {62},
     number = {3},
     year = {1988},
     zbl = {0671.14023},
     url = {http://geodesic.mathdoc.fr/item/MM2_1988__62_3_155341/}
}