Muhammad Umar, Syed, et al. “Design and Analysis of a Slotted Patch Antenna for Dualband Millimeter-Wave Applications: Design and Analysis of a Slotted Patch Antenna”. Proceedings of the Pakistan Academy of Sciences: A. Physical and Computational Sciences, vol. 57, no. 1, Mar. 2021, pp. 31-36, https://www.ppaspk.org/index.php/PPAS-A/article/view/49.