1. and , Methods of Theoretical Physics, Part II, McGraw-Hill, New York, 1953, pp. 1140-1143.
2. Electromagnetic Fields, McGraw-Hill, New York, 1964, pp. 418-424.
3. Mathematical Physics, Dover, New York, 1961, pp. 201-208.
4. and , Methoden der Mathematischen Physik I, Springer-Verlag, Berlin, 1968, pp. 258-264.
5. and , ‘Square and rectangular waveguides with rounded corners’, IEEE Trans. Microwave Theory and Techniques, MT-20, 331-337 (1972).