1. Sichuan Provincial Bureau of Statistics, 2000–2016. Sichuan Statistical Yearbook. Beijing: China Statistics Press.
2. National Bureau of Statistics, 2001–2014. China Statistical Yearbook for Regional Economy. Beijing: China Statistics Press.
3. National Bureau of Statistics, 2015–2017. China Statistical Yearbooks at a County Level. Beijing: China Statistics Press.
4. Yunnan Provincial Bureau of Statistics 2000–2016. Yunnan Statistical Yearbook. Beijing: China Statistics Press.
5. Bai X R, Tang J C, 2010. Ecological security assessment of Tianjin by PSR model. Procedia Environmental Sciences, 2: 881–887. doi: https://doi.org/10.1016/j.proenv.2010.10.099