Ermawati, D., Chasanah, U. and ., C. 2023. Formulation of Green Robust Coffee Bean Extract (Coffee Canephora) in Serum Preparation Using Gelling Agent Hidroxy Propyl Methyl Cellulose. KnE Medicine. 3, 3 (Jun. 2023), 234–245. DOI:https://doi.org/10.18502/kme.v3i3.13507.