Nguyen, Hien, Tran Huong, Do Minh, Ha Loan, and Tri Le. “Application of Response Surface Methodology to Optimize the Ultrasound-Assisted Flavonoid-Rich Extraction of Fish Mint (Houttuynia Cordata Thunb.)”. Science and Technology Development Journal 24, no. 3 (August 2, 2021): 1994-2003. Accessed May 5, 2024. http://stdj.scienceandtechnology.com.vn/index.php/stdj/article/view/2535.