Simatupang DP, Susanti N, Purba J. Stability of Styrax benzoin extract and fraction with the addition of glycerol and tween 80. J.Pendidik.Kim [Internet]. 2021 Aug. 1 [cited 2025 Jul. 4];13(2):143-50. Available from: https://jurnal.unimed.ac.id/2012/index.php/jpk/article/view/26986