RT Journal Article SR Electronic(1) A1 Sourbier, F. A1 Haidar, A. A1 Giraud, L. A1 Brossier, R. A1 Operto, S. A1 Virieux, J.YR 2008 T1 Combining direct and iterative solvers for improving ef ciency of solving wave equations when considering multi-sources problems JF , VO OP SP cp-41-00040 DO https://doi.org/10.3997/2214-4609.201405033 PB European Association of Geoscientists & Engineers, SN 2214-4609, AB , UL https://www.earthdoc.org/content/papers/10.3997/2214-4609.201405033