Intan Martha Cahyani. “Optimization Formula of Kolang-Kaling (Arenga Pinnata.) Peel-Off Gel Mask With Combination PVA - CMC Na As Gelling Agent on Simplex Lattice Design”. REPOSITORY STIFAR00 (June 18, 2025). Accessed April 17, 2026. https://repository.stifar.ac.id/Repository/article/view/783.