DUC, Tran Quang et al.
 Investigation of Drought Characteristics Across Vietnam During Period 1980-2018 using SPI and SPEI Drought Indices.
<strong>VNU Journal of Science: Earth and Environmental Sciences</strong>, [S.l.], v. 38, n. 1, mar. 2022.
ISSN 2588-1094.
Available at: &lt;<a href="https://js.vnu.edu.vn/EES/article/view/4757" target="_new">https://js.vnu.edu.vn/EES/article/view/4757</a>&gt;. Date accessed: 22 dec. 2024.
doi: <a href="https://doi.org/10.25073/2588-1094/vnuees.4757">https://doi.org/10.25073/2588-1094/vnuees.4757</a>.