“Antioxidants Activity of Self-Nanoemulsifying Drug Delivery System on Dayak Onions Extract (Eleutherine palmifolia) using DPPH (2,2 difenil-1- picrylhydrazyl) Method” (2021) Journal of Tropical Pharmacy and Chemistry, 5(4), pp. 396–405. doi:10.30872/j.trop.pharm.chem.v5i4.265.