Utami, Yuri P., et al. “Antioxidant Activity, Total Phenolic and Total Flavonoid Contents of <i>Etlingera elatior< i> (Jack) R.M. Smith from North Luwu, Indonesia: Http: www.doi.org 10.26538 Tjnpr V8i1.34”. Tropical Journal of Natural Product Research (TJNPR), vol. 8, no. 1, Feb. 2024, pp. 5955-61, https://tjnpr.org/index.php/home/article/view/3413.