P. Martin, Multiple scattering. Interaction of time-harmonic waves with N obstacles, 2006.
URL : https://hal.archives-ouvertes.fr/inria-00528448

Y. Saad, Iterative Methods for Sparse Linear Systems, 1996.
DOI : 10.1137/1.9780898718003

L. Greengard and V. Rokhlin, A fast algorithm for particle simulations, Journal of Computational Physics, vol.73, issue.2, pp.325-348, 1987.
DOI : 10.1016/0021-9991(87)90140-9