TY - JOUR AU - A. S. Il'inskii AU - O. B. Popov TI - On the direct method in problems of diffraction by smooth infinite wavy surfaces in inhomogeneous media JO - Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki PY - 1979 SP - 426 EP - 443 VL - 19 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ZVMMF_1979_19_2_a12/ LA - ru ID - ZVMMF_1979_19_2_a12 ER -