Widikdo, Wisnu, Purwantiningsih Sugita, Mohammad Khotib, Witta K. Restu, Rahmayeni Rahmayeni, and Harry Agusnar. 2023. “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) 7 (5): 2926-34. https://tjnpr.org/index.php/home/article/view/1969.