1. Chorey, C., Kong, K.S., Bhasin, K., Warner, J., Itoh, T.: Microwave theory and techniques. IEEE Trans. 39(9), 1480 (1991). doi: 10.1109/22.83821
2. Klein, N.: Rep. Prog. Phys. 65(10), 1387 (2002). http://stacks.iop.org/0034-4885/65/i=10/a=201
3. Itoh, T., Mittra, R.: Microwave theory and techniques. IEEE Trans. 21(7), 496 (1973). doi: 10.1109/TMTT.1973.1128044
4. Itoh, T.: Microwave theory and techniques. IEEE Trans. 22(11), 946 (1974). doi: 10.1109/TMTT.1974.1128390
5. Itoh, T.: Microwave theory and techniques. IEEE Trans. 28(7), 733 (1980). doi: 10.1109/TMTT.1980.1130158