F. Hidayat, A. Dewi Rosanti, F. . Fitria, A. R. A. Reza, and H. I. N. . Rachmad, “Formulation of Bar Soap Containing Neem and Sulfur as Active Ingredients and Antibacterial Testing Against Propionibacterium acnes”, fitofarmaka JIF, vol. 15, no. 2, pp. 96–103, Dec. 2025.