Damarhati, L. A. .; Fajriansyah, M. R.; Anyalirria; Putra, R. P. .; Liwanda, N.; Nurcholis, W. Optimization of Extraction Solvent for Analysis of Total Phenolic and Antioxidant Activity of Guava Leaves (Psidium Guajava) Using Simplex Centroid Design. J Jamu Indo 2023, 8, 90-96.