Chen, H., F. An, Z. Wang, and H. Yang. “Layout of Buried Pipe Drainage in the Goaf under Y-Type Ventilation”. Journal of Mines, Metals and Fuels, vol. 66, no. 4, Oct. 2022, pp. 248-52, https://informaticsjournals.com/index.php/jmmf/article/view/31695.