TY  - JOUR
AU  - V. D. Budaev
TI  - The property of being an unconditional basis of systems of eigen- and associated functions of a second-order operator with discontinuous coefficients
JO  - Doklady Akademii Nauk
PY  - 1986
SP  - 777
EP  - 780
VL  - 289
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1986_289_4_a0/
LA  - ru
ID  - DAN_1986_289_4_a0
ER  -