TY - JOUR AU - L. M. Luzhina TI - Regularity of spectral problems with supplementary conditions at interior points JO - Matematičeskie zametki PY - 1991 SP - 151 EP - 153 VL - 49 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1991_49_3_a22/ LA - ru ID - MZM_1991_49_3_a22 ER -