Widikdo, Wisnu, et al. “Optimizing the Synthesis of Silver Nanoparticles Using Five Curcuma Species under UV Irradiation As a Potent Suncreen Substrate: Http: www.doi.org 10.26538 Tjnpr V7i5.13”. Tropical Journal of Natural Product Research (TJNPR), vol. 7, no. 5, June 2023, pp. 2926-34, https://tjnpr.org/index.php/home/article/view/1969.