1. Axtell, C., Murray, T., Kulessa, B., Clark, R.A., and Gusmeroli, A., 2016, Improved accuracy of cross-borehole radar velocity models for ice property analysis: Geophysics, vol. 81, no. 1, pp. WA203–WA212.
2. Cook, J.C., 1977, Borehole exploration in a coal seam: Geophysics, vol. 42, no. 6, pp. 1254–1257.
3. Davis, D.T., Lytle, R.J., and Lame, E.F., 1979, Use of high-frequency electromagnetic waves for mapping an in situ coal gasification burn front,” In Situ, vol. 3, no. 2., pp.95–119.
4. Deiana, R., Cassiani, G., Kemna, A., Villa, A., Bruno, V., and Bagliani, A., 2007, An experiment of non-invasive characterization of the vadose zone via water injection and cross-hole time-lapse geophysical monitoring: Near Surface Geophysics, vol. 5, no.3, pp. 183–194.
5. Eisenburger, D., Sender, F., Thierbach, R., 1993, Borehole radar —an efficient geophysical tool to aid in the planning of salt caverns and mines: Seventh Symposium on Salt, vol. 1, pp. 279–284.