Sirichai, Somsak, and Khajadpai Thipyapong. “High-Performance Liquid Chromatography Method for Simultaneous Determination of Paracetamol and Tramadol in Tablet Using Chromolith C18 Column”. Burapha Science Journal 27, no. 1 January-April (March 19, 2026): 334–344. accessed September 2, 2026. https://li05.tci-thaijo.org/index.php/buuscij/article/view/1330.