WIMPY, W.; HARNINGSIH, T.; SISVITARA, Y. The Screening of Antioxidant Activities of Meniran Plants (Phyllanthus niruri Linn) and Guava Leaves (Psidium guajava Linn) Combination Using DPPH Free Radical Method. Biomedika, v. 13, n. 2, p. 104-110, 23 set. 2020.