Hong Son, Lo, et al. “USING MULTI-TEMPORAL REMOTE SENSING DATA TO QUANTIFY FOREST COVER CHANGE IN DIEN BIEN DONG DISTRICT, DIEN BIEN PROVINCE DURING 1991 - 2017”. Journal of Forestry Science and Technology, no. 2, Apr. 2018, pp. 122-30, https://journal.vnuf.edu.vn/en/article/view/964.