Geodesic

The topology of integrable differential forms near a singularity
p. 5-35
Ergodic theory, semisimple Lie groups and foliations by manifolds of negative curvature
p. 37-62
Problèmes de modules pour des équations différentielles non linéaires du premier ordre
p. 63-164
On the obstruction group in homology surgery
p. 165-206