RT Journal Article SR Electronic(1) A1 Brulant, P.YR 1997 T1 Controlled lnitial-Value Ray Tracing and Two-Point Ray Tracing in 3D JF , VO OP SP cp-131-00290 DO https://doi.org/10.3997/2214-4609-pdb.131.GEN1997_P025 PB European Association of Geoscientists & Engineers, SN 2214-4609, AB , UL https://www.earthdoc.org/content/papers/10.3997/2214-4609-pdb.131.GEN1997_P025