Verma, R., M. Khan, and P. Gargeya. “Design and Analysis of Stepped Impedance Microstrip Low Pass Filter for Wireless Applications”. SRMS Journal of Mathmetical Science, Vol. 1, no. 01, May 2014, pp. 103-11, https://www.srmsjmaths.in/index.php/SRMSMATHS/article/view/46.