“Total Phenolic Content and Antioxidant Activity Test of Matoa Stem Bark Extract (Pometia pinnata J.R.Forst. & G. Forst) with DPPH” (2026) JPK : Jurnal Proteksi Kesehatan, 14(2), pp. 103–111. Available at: https://jurnal.pkr.ac.id/index.php/JPK/article/view/1245 (Accessed: 7 February 2026).