Risa Ahdyani (2025) “Influence of Hydroxyethyl Cellulose and Glycerin Concentration Variations on the Physicochemical Stability of Niacinamide- Loaded Nanoparticle Serum Formulations”, Ad-Dawaa’ Journal of Pharmaceutical Sciences, 8(2), pp. 221–234. doi: 10.24252/djps.v8i2.60421.