@article{CMH_1984__59_139993,
     author = {Daniel R. Grayson},
     title = {Reduction theory using semistability.},
     journal = {Commentarii mathematici Helvetici},
     pages = {600--634},
     publisher = {mathdoc},
     volume = {59},
     year = {1984},
     zbl = {0564.20027},
     url = {http://geodesic.mathdoc.fr/item/CMH_1984__59_139993/}
}