Hieu, N., 		Bac, D., & 		Ba, D.
(2011).
 Application of N-SPECT model and GIS for Soil erosion assessment in Sapa district, Lao Cai province.
<em>VNU Journal Of Science: Earth And Environmental Sciences, 27</em>(4).
Retrieved from <a href="https://js.vnu.edu.vn/EES/article/view/1516" target="_new">https://js.vnu.edu.vn/EES/article/view/1516</a>