RT Journal Article SR Electronic(1) A1 Heikkinen, E. A1 Saksa, P. A1 Lehtimäki, T. A1 Hellä, P.YR 2003 T1 Borehole radar performance on fracture zone characterisation in crystalline bedrock JF , VO OP SP cp-52-00095 DO https://doi.org/10.3997/2214-4609.201414565 PB European Association of Geoscientists & Engineers, SN 2214-4609, AB , UL https://www.earthdoc.org/content/papers/10.3997/2214-4609.201414565