Apaphant, Keerati, Sakda Makliang, and Poramate Boonmee. “Analog FM Services Spectrum Valuation for the Broadcasting Spectrum Auction”. Interdisciplinary Academic and Research Journal 2, no. 6 (November 13, 2022): 195–216. accessed April 7, 2025. https://so03.tci-thaijo.org/index.php/IARJ/article/view/2022-11-13.