Time-lapse imaging of saline-tracer transport in fractured rock using difference-attenuation radar tomography.

Day-Lewis, F.D., Lane, J.W., Harris, J.M., and Gorelick, S.M., Time-lapse imaging of saline-tracer transport in fractured rock using difference-attenuation radar tomography, Water resources Research, Vol.39, No. 10, 2003.