He, Shudong. “Research on the Analysis and Evaluation of Risk Factors for Gas and Coal Spontaneous Combustion in Large-Scale Goaf Areas”. International Journal of Natural Resources and Environmental Studies 3, no. 3 (October 22, 2024): 1–10. Accessed August 10, 2026. https://ojs.ijnres.org/index.php/IJNRES/article/view/4030.