%0 Journal Article %A Turkel, Eli %T Comments on iterative schemes for high order compact discretizations to the exterior Helmholtz equation %J ESAIM: Mathematical Modelling and Numerical Analysis %D 2015 %P 221-223 %V 49 %N 1 %I EDP-Sciences %U http://www.numdam.org/articles/10.1051/m2an/2014031/ %R 10.1051/m2an/2014031 %G en %F M2AN_2015__49_1_221_0