@article{CMH_1986__61_140073,
     author = {Daniel R. Grayson},
     title = {Reduction theory using semistability, {II.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {661--676},
     publisher = {mathdoc},
     volume = {61},
     year = {1986},
     zbl = {0616.20020},
     url = {http://geodesic.mathdoc.fr/item/CMH_1986__61_140073/}
}