Teerarak, M., Laosinwattan, C., Tangwatcharin, P., and Pilasombut, K. “Antioxidant and antibacterial activities against food pathogenic and spoilage bacteria by Hibicus sabdariffa L. (roselle) extract”. International Journal of Agricultural Technology, vol. 13, no. 3, May 2017, pp. 379-91, https://li04.tci-thaijo.org/index.php/IJAT/article/view/6742.