1. Maximally-flat Filters in Waveguide
2. Investigations on planar periodic structures with uniform microstrip lines
3. Microwave Engineering Passive Circuits, Prentice-Hall, Englewood Cliffs, NJ, 1988, pp. 462–489.
4. Microwave Transmission Circuits, McGraw-Hill, New York, 1948, pp. 541–551.
5. , and , Principles of Microwave Circuits, McGraw-Hill, New York, 1948, p. 230.