A cohomology for foliated manifolds.
A necessary and sufficient condition for a vector field to be Killing.
A note on the local structure of levels of a plane vector field
A secondary Chern-Euler class.
A set of axioms for the degree of a tangent vector field on differentiable manifolds.
Algèbres commutatives de champs de vecteurs isochores
Anwendungen der differentialtopologischen Berechnung der totalen Krümmung und totalen Absolutkrümmung in der sphärischen Differentialgeometrie.
Äquivariante 2-Felder auf Mannigfaltigkeiten mit Involution.