Phip, Ninh, Nguyen Mai, Nguyen Hai, and Nguyen Thom , trans. 2021. “Study on Stem Cutting Propagation of Gynostemma Pentaphyllum (Thunb.) Makino in Hoa Binh Province”. Vietnam Journal of Agricultural Sciences 4 (2): 1034-42. https://doi.org/10.31817/vjas.2021.4.2.04.