1. Investigation of the parasitic loop counterpoise antenna;Sengupta;IEEE Trans. Antennas and Propag.,1969
2. Characteristics of finite reflectors and single-element loop antennas;Sekiguchi;Trans. I.E.C.E., Japan,1976
3. Iwashiga, Analysis of circular-reflector-loop by GTD Bulletin of Kyushu University, 52, 3, pp. 253-257 (June 1979).
4. Evaluation of of edge-diffracted fields including equivalent currents for the caustic regions;Ryan;IEEE Trans. Antennas and Propag.,1969
5. Ando and Sekiguchi: On the integral by equivalent edge current method, Tech. Report I.E.C.E., Japan, AP78-35 (June 1978).