2022. A New Directional Algebraic Fast Multipole Method Based Iterative Solver for the Lippmann-Schwinger Equation Accelerated with HODLR Preconditioner. Communications in Computational Physics. 32, 4 (Oct. 2022), 1061–1093. DOI:https://doi.org/10.4208/cicp.OA-2022-0103.