TY - JOUR AU - Brandt, A. AU - Livshits, I. TI - Wave-ray multigrid method for standing wave equations JO - Electronic transactions on numerical analysis PY - 1997 SP - 162 EP - 181 VL - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ETNA_1997__6__a8/ LA - en ID - ETNA_1997__6__a8 ER -