Kamkayan, P., & Assatarakul, K. (2021). Effect of single-factor by ultrasound-assisted extraction on antioxidant properties of extract from jiaogulan (Gynostemma pentaphyllum) leaves. Journal of Food Technology, Siam University, 16(2), 95–108. retrieved from https://li01.tci-thaijo.org/index.php/JFTSU/article/view/248386