Ye Xue, Xiaoxiao Li, Wen Sun, and Baozhang Chen. “A Fuzzy Method for Assessing Eco-Environmental Disaster Risk Caused by Coalbed Methane in China”. Journal of Risk Analysis and Crisis Response 8, no. 1 (October 15, 2021). Accessed May 1, 2024. https://jracr.com/index.php/jracr/article/view/228.