Tai, Vu Anh, and Nguyen Nghia Thin. “Diversity of Flora and the Vegetation at High Belt, over 1600 M Alt. Of the Hoang Lien National Park, Lao Cai Province”. Academia Journal of Biology 29, no. 4 (November 12, 2014): 27–30. Accessed September 25, 2021. https://vjs.vjs.ac.vn/index.php/vjbio/article/view/5398.