Tai, Vu Anh. “A New Record of Species Rubia Tinctorum L. (Rubiaceae) for the Flora of Vietnam”. <i>Academia Journal of Biology</i> 34, no. 4 (January 13, 2013): 452–454. Accessed November 6, 2025. https://cip.vast.vn/vjbio/article/view/2681.