1. The geometrical theory of diffraction, Symposium on Microwave Optics, Eaton Electronics Research Laboratory, McGill Univ., Montreal, Canada, June, 1953;
2. or A Geometrical Theory of Diffraction in Calculus of Variations and Its Applications, Proceedings of Symposia in Applied Math., Vol. VIII, pp. 27–52, McGraw-Hill, New York, 1958.
3. Diffraction by a convex cylinder, URSI Michigan Symposium on Electromagnetic Wave Propagation, Ann Arbor, Michigan, June, 1955.
4. Diffraction by an aperture, New York Univ. Res. Rep. No. EM-81, 1955, and
5. Diffraction by an Aperture