RT Journal Article SR Electronic(1) A1 E. Anderson, J. A1 R. Krebs, J. A1 Hinkley, D.YR 2008 T1 Sources Near The Free-Surface Boundary: Pitfalls for Elastic Finite-Difference Seismic Simulation And Multi-Grid Waveform Inversion JF , VO OP SP cp-41-00082 DO https://doi.org/10.3997/2214-4609.201405075 PB European Association of Geoscientists & Engineers, SN 2214-4609, AB , UL https://www.earthdoc.org/content/papers/10.3997/2214-4609.201405075