TY  - JOUR
AU  - V. I. Gorbachuk
AU  - M. L. Gorbachuk
TI  - Expansion in the eigenfunctions of second order differential equation with operator coefficients
JO  - Doklady Akademii Nauk
PY  - 1969
SP  - 774
EP  - 777
VL  - 184
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1969_184_4_a2/
LA  - ru
ID  - DAN_1969_184_4_a2
ER  -