Nanocrystalline Toothpaste Formulation of Usnic Acid and Antibacterial Activity Test Against Streptococcus Mutans. JURNAL PROTEKSI KESEHATAN [Internet]. 24 Juli 2023 [dikutip 2 Februari 2026];12(1):70-6. Tersedia pada: https://jurnal.pkr.ac.id/index.php/JPK/article/view/677