Nurcholis, Waras, et al. “Optimization of Flavonoid Extraction and Antioxidant Capacity from Acanthus ilicifolius Using Microwave-Assisted Extraction and I-Optimal Response Surface Methodology ”. Tropical Journal of Natural Product Research (TJNPR), vol. 8, no. 12, Dec. 2024, pp. 9470 – 9475, https://doi.org/10.26538/tjnpr/v8i12.18.