S. S. Mohan Reddy, M. M. Vinod Kumar, B. Sanjay, K. Aruna Kumari, and G. V. S. Padma Rao, “Microstrip Line Fed Fractal Monopole Antenna with Defected Ground Structure”, IJET, vol. 7, no. 3.31, pp. 21–24, Aug. 2018, doi: 10.14419/ijet.v7i3.31.18193.