V. Tran-Thi, H. Nguyen Ngan, V. Ha Quoc, L. Nguyen Hoang, and B. Ha Duong Xuan, “Method of drought evaluation for a territory by the land surface temperature and vegetation relationship from remote sensing data”, VNUHCM Journal of Engineering and Technology, vol. 2, no. 4, pp. 306-315, Dec. 2019.