1. The coerciveness problem for integro-differential forms
2. Remarks on self-adjoint and semi-bounded elliptic boundary value problems, Proc. Internat. Symposium Linear Spaces, Jerusalem, 1960, Jerusalem Academic Press, 1961, pp. 1–13.
3. Espaces Vectoriels Topologiques, Chap. I-II, Paris, 1953; Chap. III-V, Paris, 1955.