TY - JOUR AU - Daniel R. Grayson TI - Reduction theory using semistability. JO - Commentarii mathematici Helvetici PY - 1984 SP - 600 EP - 634 VL - 59 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMH_1984__59_139993/ ID - CMH_1984__59_139993 ER -