The normality of closures of orbits in a Lie algebra. Wim Hesselink — 1979 Commentarii mathematici Helvetici
Cohomology and the Resolution of the Nilpotent Variety. Wim H. Hesselink — 1976 Mathematische Annalen
Nilpotency in Classical Groups over a Field of Characteristic 2. Wim H. Hesselink — 1979 Mathematische Zeitschrift
Schemes of linear configurations in projective plane. Wim H. Hesselink — 1984 Journal für die reine und angewandte Mathematik
Uniform instability in reductive groups. Wim H. Hesselink — 1978 Journal für die reine und angewandte Mathematik
Algorithmic orbit classification for some Borel group actions Hartmut Bürgstein; Wim H. Hesselink — 1987 Compositio Mathematica