%0 Journal Article
%A H. Calandra
%A S. Gratton
%A R. Lago
%A X. Pinel
%A X. Vasseur
%T Two-level preconditioned Krylov subspace methods for the solution of three-dimensional heterogeneous Helmholtz problems in seismics
%J Sibirskij žurnal vyčislitelʹnoj matematiki
%D 2012
%P 213-221
%V 15
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SJVM_2012_15_2_a11/
%G ru
%F SJVM_2012_15_2_a11