1. Antenna Theory: Analysis and Design;Balanis,2005
2. Impedance of thin-wire loop antennas;Storer;Trans. Am. Inst. Electr. Electron. Inst. Part I,1956
3. Loop antenna measurements;Kennedy;IRE Trans. Antennas Propag.,1956
4. H. Elkamchouchi, M.A Nasr, The ladder and figure-eight antennas, in: 21st National Radio Science Conference, Cairo, Egypt, 2004.
5. K. Endo, G. Sato, H. Kawakmi, M. Sato, Y. Ishii, Moment method for a twin loop antenna, in: Antennas and Propagation Society International Symposium, Los Angeles, USA, 1981.