F. . Fatimah, N. . Susilaningsih, H. Sukmaningtyas, y A. . Subagio, «Synthesis of manganese nanoparticles of Oolong tea extract by sonication method for a natural oral contrast media on magnetic resonance cholangiopancreatography», Gac Méd Caracas, vol. 130, n.º 5S, nov. 2022.