Fitrya, F., Fithri, N.A., Untari, B. and Aprililianti 2021. Tablet Formula Optimization From Helminthostachys Zaylanica Extract Using A Simplex Lattice Design. Science and Technology Indonesia. 6, 3 (Jul. 2021), 131–136. DOI:https://doi.org/10.26554/sti.2021.6.3.131-136.