Liwanda, N., Nisa, Z. K., Windrianti, S., Soplanit, T. A., and Nurcholis, W. “Solvent optimization enhanced phenolic content and antioxidant activity in ultrasound-assisted extraction of Boesenbergia rotunda rhizomes”. International Journal of Agricultural Technology 21, no. 1 (February 28, 2025): 97–106. accessed April 22, 2025. https://li04.tci-thaijo.org/index.php/IJAT/article/view/4084.