V. Aspadiah, N. I. Akib, A. Indalifiany, R. Muliadi, and R. R. Layuk, “Optimization of Tween 80 and Span 80 Combination in the Formulation of Niacinamide-Containing Body Lotion”, J. Pharm. Nat. Resour., vol. 1, no. 1, pp. 1–7, Jun. 2025.