TY - JOUR AU - Frank D. Grosshans TI - Constructive geometric invariant theory for certain nonreductive groups JO - Banach Center Publications PY - 1990 SP - 269 EP - 287 VL - 26 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/-26-2-269-287/ DO - 10.4064/-26-2-269-287 LA - en ID - 10_4064__26_2_269_287 ER -