Chi Zhang, Zhiwei Sheng, Jingyan Chu, Pei Zhao,. “Gridded Assessment of Ecological Vulnerability in Loess Hilly Region of Western Henan Province, China”. Forest Chemicals Review (November 16, 2021): 220-237. Accessed December 10, 2025. http://www.forestchemicalsreview.com/index.php/JFCR/article/view/157.