T. S. Wardani, Y. S. Aziz, R. A. H. Wahid, and R. Setianto, “Formulation and Antibacterial Activity of Gold (Au) Nanoparticles Serum from Green Coffee (Coffea canephora var. Robusta) Bean Extract”, TJNPR, vol. 8, no. 9, pp. 8561–8570, Oct. 2024, doi: 10.26538/tjnpr/v8i9.45 .