Saleha Shaikh, Danish Pathan, Danish Shaikh, Suraj Mishra, and Pratima Rao. “Stub Loaded Dual Band Circulaly Polarized Microstrip Antenna for GPS Application”. International Journal of Advance Research in Engineering, Science & Technology, vol. 3, no. 4, Apr. 2016, pp. 128-30, https://ijarest.org/index.php/ijarest/article/view/521.