1. Bahl, I.J., and Bhartia, P.: Microstrip antennas, (Artech House, Dedham, MA, USA 1980)
2. James, J.R., Hall, P.S., and Wood, C.: Microstrip antenna theory and design, (Peter Peregrinus, London 1981)
3. Dubost, G.: Flat radiating dipoles and application to arrays, (Research studies press, John Wiley, New York 1981)