[1966] The finite dimensional basis problem with an appendix on nets of Grassmann manifolds

[1967] Characters, asymptotics and ν-homology of Harish-Chandra modules

[1968] On the local solvability and the local integrability of systems of vector fields

[1969] Erratum to: Real hypersurfaces in complex manifolds

[1970] Normal forms for real surfaces in C^{2}near complex tangents and hyperbolic surface transformations