Ma, Y., Shen, J., Su, B., Ma, Y., & Sun, Q. (2019). Research on Ground of Penetrating Radar in the Coal Mine Detecting: A Case Study of Application in Huaibei Coal Mine. Elektronika Ir Elektrotechnika, 25(5), 37-42. https://doi.org/10.5755/j01.eie.25.5.24354