Đức, N.V., Nhung, T.T.P., Thắng, T.V., Thông, C.V.T., Toản, H.K. and Hải, T.T.H. 2019. Growth, development and yield of several sweetgrass (Stevia rebaudiana bertoni) varieties in winter crop 2018 in Thua Thien Hue . Hue University Journal of Science: Natural Science. 128, 1E (Oct. 2019), 133-141. DOI:https://doi.org/10.26459/hueuni-jns.v128i1E.5420.