Parallelizability of Homogeneous Spaces, II (Erratum). W. Singhof; D. Wemmer — 1986 Mathematische Annalen
On the d-invariant of compact solvmanifolds. W. Singhof; Ch. Deninger — 1985 Journal für die reine und angewandte Mathematik
The e-invariant and the spectrum of the Lapacian for compact nilmanifolds covered by Heisenberg groups. W. Singhof; Ch. Deninger — 1984 Inventiones mathematicae
On the cohomology of nilpotent Lie algebras Ch. Deninger; W. Singhof — 1988 Bulletin de la Société Mathématique de France