Ha, Si Young, et al. “Optimization of Antioxidant Activity and Phenolic Extraction from Ainsliaea Acerifolia Stem Using Ultrasound-Assisted Extraction Technology ”. BioResources, vol. 19, no. 3, July 2024, pp. 6325-38, https://ojs.bioresources.com/index.php/BRJ/article/view/23425.