%0 Journal Article %A G. V. Alekseev %A E. G. Komarov %T The non-self-conjugate singular spectral problem for a Helmholtz operator with discontinuous coefficients %J Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki %D 1992 %P 587-597 %V 32 %N 4 %U http://geodesic.mathdoc.fr/item/ZVMMF_1992_32_4_a7/ %G ru %F ZVMMF_1992_32_4_a7