TY - JOUR AU - I. L. Rubanov TI - On the solution of a mixed boundary value problem for the Helmholtz equation in the exterior of a sphere JO - Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki PY - 1977 SP - 522 EP - 527 VL - 17 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ZVMMF_1977_17_2_a26/ LA - ru ID - ZVMMF_1977_17_2_a26 ER -