RT Journal Article SR Electronic(1) A1 Markovaara-Koivisto, M. A1 Hokkanen, T.YR 2011 T1 Effect of a Discontinuity’s Aperture on the GPR Signal JF , VO OP SP cp-253-00013 DO https://doi.org/10.3997/2214-4609.20144377 PB European Association of Geoscientists & Engineers, SN 2214-4609, AB , UL https://www.earthdoc.org/content/papers/10.3997/2214-4609.20144377