Sarmilee, Muhammad Zamakhsyari. “Comparison of Wireless Data Communication System (WDCS) Antenna in Between MRT Kajang Line and MRT Putrajaya Line”. Progress in Engineering Application and Technology, vol. 3, no. 2, Dec. 2022, pp. 833-40, https://publisher.uthm.edu.my/periodicals/index.php/peat/article/view/8057.