Saputri Nst, S.E. et al. 2026. FORMULATION AND CHARACTERIZATION OF CERAMIDE NANOEMULGEL LIP SERUM: OPTIMIZATION USING RESPONSE SURFACE METHODOLOGY. Jurnal Penelitian Farmasi Indonesia. 15, 1 (Jun. 2026), 34–41. DOI:https://doi.org/10.51887/jpfi.v15i1.2250.