TY  - JOUR
AU  - L. D. Faddeev
TI  - An expression for the trace of the difference between two singular differential operators of the Sturm--Liouvilie type
JO  - Doklady Akademii Nauk
PY  - 1957
SP  - 878
EP  - 881
VL  - 115
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1957_115_5_a7/
LA  - ru
ID  - DAN_1957_115_5_a7
ER  -