Linfeng Chen؛ V. V. Varadan؛ C. K. Ong؛ Chye Poh Neo (2004). "Microwave theory and techniques for materials characterization". Microwave electronics. Wiley. ص. 37. ISBN:0-470-84492-2. مؤرشف من الأصل في 2014-01-01.
Linfeng Chen؛ V. V. Varadan؛ C. K. Ong؛ Chye Poh Neo (2004). "Microwave theory and techniques for materials characterization". Microwave electronics. Wiley. ص. 37. ISBN:0-470-84492-2. مؤرشف من الأصل في 2014-01-01.