References
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- Collin , R. E. 1966 . Foundations for Microwave Engineering , 344 – 351 . Kogausha : McGraw-Hill .
- Slater , J. C. 1950 . Microwave Electronics , D. Van Nostrand .
- Jones , D. S. 1986 . Acoustic and Electromagnetic Waves , 199 Oxford : Clarendon Press .