1. Anselin, L. (1995). Local indicators of spatial association—LISA. Geographical Analysis, 27(2), 93–115.
2. Anyuan Annual Report. (2021a). Anyuan Annual Report in 2021a. Retrieved June 20, 2022, from http://www.ay.gov.cn/ayxxxgk/ay1396/2021a11/69c1912a01af41aeb40af4258c1f4fe6.shtml. (In Chinese)
3. Anyuan Annual Report. (2021b). Anyuan annual report in 2021b. Retrieved June 20, 2022, from http://www.ay.gov.cn/ayxxxgk/ay1639/2021b09/68652c670d3b46268326d586ee724f0a.shtml. (In Chinese)
4. Anyuan Yearbook. (2020). Anyuan yearbook in 2019. Shaanxi: Xi’an Sanqin Publishing House. (In Chinese)
5. Bai, X., & Tang, J. (2010). Ecological security assessment of Tianjin by PSR model. Procedia Environmental Science, 2, 881–887.