TY - JOUR AU - V. A. Il'in AU - E. I. Moiseev TI - On the absence of the basis property of a system of root functions of a problem with an oblique derivative JO - Differencialʹnye uravneniâ PY - 1994 SP - 128 EP - 143 VL - 30 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1994_30_1_a14/ LA - ru ID - DE_1994_30_1_a14 ER -