Pattanachatchai, N., Tongsanit, N., and Kongkum, N. “Leaf chlorophyll content, phenolic content, flavonoid content and antioxidant activity of collard greens in response to fertilizer value of duckweed”. International Journal of Agricultural Technology 22, no. 5 (September 17, 2026): 2323–2342. accessed October 5, 2026. https://li04.tci-thaijo.org/index.php/IJAT/article/view/13669.