@article{CM_1989__70_1_13_0,
     author = {Shepherd-Barron, N. I.},
     title = {Invariant theory for $S_5$ and the rationality of $M_6$},
     journal = {Compositio Mathematica},
     pages = {13--25},
     publisher = {Kluwer Academic Publishers},
     volume = {70},
     number = {1},
     year = {1989},
     mrnumber = {993171},
     zbl = {0704.14044},
     language = {en},
     url = {http://archive.numdam.org/item/CM_1989__70_1_13_0/}
}