TY  - JOUR
AU  - V. A. Marchenko
AU  - I. V. Ostrovskii
TI  - A~characterization of the spectrum of Hill's operator
JO  - Sbornik. Mathematics
PY  - 1975
SP  - 493
EP  - 554
VL  - 26
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1975_26_4_a4/
LA  - en
ID  - SM_1975_26_4_a4
ER  -