1. COHEN, M. H., CROWLEY, T. H. and LEVIS, C. A. (1951) The Aperture Admittance of a Rectangular Waveguide Radiating into Half Space, Antenna Laboratory, Ohio State Research Foundation, Columbus, Ohio, Rept. No. 339–22, Contract No. USAF W 33–038 ac 21114.
2. COMPTON, R. T. (1964) The Admittance of Aperture Antennas Radiating Into Lossy Media, Report No. 1691–5, Antenna Laboratory, Ohio State Research Foundation, Columbus, Ohio.
3. CUTLER, S. (1959) The Effects of a Plasma Sheath on the Impedance Properties of Some Slot Antennas. Part I. Analytical Formulation, Tech. Research Group, Inc. Syosett, NY., Report No. TRG-127-SR-1, Contract No. AF-19 (604)-4574.
4. Tables of Integral Transforms;ERDELYI,1954
5. Admittance of rectangular slot which is backed by a rectangular cavity;GALEJS;IEEE Trans. on Ant. and Prop.,1963