1. Marcuvitz N.; “Waveguide Handbook”; Radiation Laboratory series vol 10, McGraw-Hill pp (1951)
2. Harvey A.R., “A Millimetre wave, quasi-optical, complex impedance bridge”, PhD thesis, University of St. Andrews, UK (1990)
3. Manufactured by Thomas Keating Ltd., Billingshurst, Sussex, UK
4. Goldsmith P. “Quasi-optical techniques at Millimetre and Submillimetre Wavelengths”, Ch. 5 inInfrared and Millimetre Waves Vol 6. K. Button Ed., Academic Press (1982)
5. Kogelnik H.,”Coupling and conversion coefficients for optical modes”, Symp. on Quasi-Optics, Brooklyn (1964)