1. Burnside, W.D., and Marhefka, R.J.: ‘Antennas on aircraft, ships, or any large, complex environment’, Lo, Y.T., Lee, S.W., Antenna handbook, (Van Nostrand Reinhold NY 1988),20, p. 20/1—20/100
2. The quadrifilar helix antenna
3. Moore, J., and Pizer, R.: ‘Moment methods in electromagnetics techniques and applications’, (Research Studies Press 1984)