OFFICIAL Zhou, B., and van de Werken, M., 2015, Conductively guided borehole radar wave for imaging ahead of a drill bit: IEEE Geoscience and Remote Sensing Letters, 12 (8), 17151719. http://ieeexplore.ieee.org/document/7093167/ . Zhou, B., van de Werken, and Huo, J., 2020, Coal top detection by conductively-guided borehole radar wave imaging for open cut blast-hole drilling: Geophysical Prospecting, 68(3), 982–998. http://dx.doi.org/10.1111/1365-2478.12874
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