Sodsri, C. (2018) “TVAR Modeling and Time-Varying Frequency Estimation of Nonstationary Signals”, CURRENT APPLIED SCIENCE AND TECHNOLOGY. Bangkok, Thailand, 5(1), pp. 123–139. available at: https://li01.tci-thaijo.org/index.php/cast/article/view/160581 (accessed: 21 September 2026).