Zhang, Junxiang, and Bo Li. “Study on the Reasonable Number of Demolished Pre-Drainage Boreholes Drilled Along Coal Seams”. Journal of Mines, Metals and Fuels 64, no. 12 (October 19, 2022): 625–630. Accessed November 7, 2024. https://informaticsjournals.co.in/index.php/jmmf/article/view/31626.