Kurniawati , Cahyani Rizki, Rofidah Nur Umar, and Sapri Sapri. “Formulation and Physical Characterization of Nanopropolis (Trigona sp.) Hydrogel Acne Patch from Balikpapan”. Journal of Pharmaceutical and Sciences 9, no. 3 (September 21, 2026): 3073–3081. Accessed September 22, 2026. https://journal-jps.com/new/index.php/jps/article/view/1759.