Sudipta Das, Partha Pratim Sarkar, and Santosh Kumar Chowdhury. “Analysis of Slits Loaded Compact Printed Antenna for Multifrequency Operation”. International Journal of Advances in Microwave Technology, vol. 2, no. 1, Oct. 2020, pp. 80-84, https://ijamt.com/index.php/ijamt/article/view/45.