TY - JOUR AU - Turkel, Eli TI - Comments on iterative schemes for high order compact discretizations to the exterior Helmholtz equation JO - ESAIM: Mathematical Modelling and Numerical Analysis PY - 2015 SP - 221 EP - 223 VL - 49 IS - 1 PB - EDP-Sciences UR - http://www.numdam.org/articles/10.1051/m2an/2014031/ DO - 10.1051/m2an/2014031 LA - en ID - M2AN_2015__49_1_221_0 ER -