Duc, T., 		Thao, N., 		Long, T., 		Van Tan, P., 		Thi Thu Huong, C., & 		Van Hiep, N.
(2022).
 Investigation of Drought Characteristics Across Vietnam During Period 1980-2018 using SPI and SPEI Drought Indices.
<em>VNU Journal Of Science: Earth And Environmental Sciences, 38</em>(1).
doi:10.25073/2588-1094/vnuees.4757