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2. Balanis CA: Antenna Theory: Analysis and Design, John Wiley and Sons, New York, 2004.
3. Vinod Kumar Singh, Zakir Ali, Shahanaz Ayub, and Ashutosh Kumar Singh: A wide band Compact Microstrip Antenna for GPS/DCS/PCS/WLAN Applications, Intelligent Computing, Networking, and Informatics, (ISBN: 978-81-322-1664-3), Springer, vol. 243, pp. 1107–1113, (2014).
4. Rajat Srivastava, Vinod Kumar Singh, and Shahanaz Ayub: Comparative Analysis and Bandwidth Enhancement with Direct Coupled C Slotted Microstrip Antenna for Dual Wide Band Applications, Frontiers of Intelligent Computing: Theory and Applications, (ISBN: 978-3-319-12011-9), Springer, vol. 328, pp. 449–455, (2015).
5. Vinod Kumar Singh, Zakir Ali, Shahanaz Ayub, and Ashutosh Kumar Singh: Bandwidth Optimization of Compact Microstrip Antenna for PCS/DCS/Bluetooth Application, Central European Journal of Engineering, Springer, vol. 4, no. 3, pp. 281–286, (2014).