TY  - JOUR
AU  - V. D. Budaev
TI  - The property of being an unconditional basis on a closed interval, for systems of eigen- and associated functions of a second-order operator with discontinuous coefficients
JO  - Differencialʹnye uravneniâ
PY  - 1987
SP  - 941
EP  - 952
VL  - 23
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1987_23_6_a2/
LA  - ru
ID  - DE_1987_23_6_a2
ER  -