Suksai , C., and S. Watchasit. “Naked-Eye Test Kit for Copper (II) Ion Using Cellulose Triacetate as Solid Support”. Burapha Science Journal, vol. 26, no. 1 January-April, Mar. 2026, pp. 358-77, https://li05.tci-thaijo.org/index.php/buuscij/article/view/1437.