TY  - JOUR
AU  - D. V. Valovik
TI  - On the integral characteristic function of the Sturm-Liouville problem
JO  - Sbornik. Mathematics
PY  - 2020
SP  - 1539
EP  - 1550
VL  - 211
IS  - 11
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_2020_211_11_a1/
LA  - en
ID  - SM_2020_211_11_a1
ER  -