1. Bahl, I.J., and Bhartia, P.: Microstrip antennas, (Artech House 1980)
2. James, J.R., Hall, P.S., and Wood, C.: Microstrip antennas — theory and design, (Peter Peregrinus 1981)
3. Gupta, K.C., Garg, R., and Bahl, I.J.: Microstrip lines and slotlines, (Artech House 1979)