TY - JOUR AU - Yu. N. Protas TI - Quasiclassical asymptotics of the scattering amplitude for the scattering of a~plane wave by inhomogeneities of the medium JO - Sbornik. Mathematics PY - 1983 SP - 487 EP - 506 VL - 45 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_1983_45_4_a5/ LA - en ID - SM_1983_45_4_a5 ER -