Wang, X., M.-J. Peng, Z.-H. Wang, Q.-L. Yang, and S. Peng. “Ultrasound-Microwave Assisted Extraction of Flavonoid Compounds from Eucommia Ulmoides Leaves and an Evaluation of Their Antioxidant and Antibacterial Activities”. Archives of Biological Sciences, vol. 72, no. 2, July 2020, pp. 211-2, https://serbiosoc.org.rs/arch/index.php/abs/article/view/4921.