Wahyuni, Rina, Henny Lucida, Gusti Revilla, Friardi Ismed, and Erizal Zaini. “Preparation and Characterization of Usnic Acid Nanocrystals With the Wet Grinding Method Using a Planetary Ball Mill: Http: www.doi.org 10.26538 Tjnpr V8i1.13”. Tropical Journal of Natural Product Research (TJNPR) 8, no. 1 (February 1, 2024): 5801–5805. Accessed November 28, 2024. https://tjnpr.org/index.php/home/article/view/3389.