Wahyuni, R.; Lucida, H.; Revilla, G.; Ismed, F.; Zaini, E. 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. TJNPR 2024, 8, 5801-5805.