A character approach to Looijenga's invariant theory for generalized root systems Peter Slodowy (1985) Compositio Mathematica
A characterization of quasi-homogeneous Gorenstein surface singularities Jonathan M. Wahl (1985) Compositio Mathematica
A vanishing theorem concerning the Artin component of a rational surface singularity. Oswald Riemenschneider, Ancus Röhr (1990) Mathematische Annalen
Ambient Deformations for Exceptional Sets in Two-Manifolds. Henry B. Laufer (1979) Inventiones mathematicae
Appendix to : “smoothings of cusp singularities via triangle singularities” H. Pinkham (1984) Compositio Mathematica