TY - JOUR AU - Shepherd-Barron, N. I. TI - Invariant theory for $S_5$ and the rationality of $M_6$ JO - Compositio Mathematica PY - 1989 SP - 13 EP - 25 VL - 70 IS - 1 PB - Kluwer Academic Publishers UR - http://archive.numdam.org/item/CM_1989__70_1_13_0/ LA - en ID - CM_1989__70_1_13_0 ER -