TY  - JOUR
AU  - Ya. M. Dymarskii
AU  - Yu. A. Evtushenko
TI  - Foliation of the space of periodic boundary-value problems by hypersurfaces corresponding to fixed lengths of the $n$th spectral lacuna
JO  - Sbornik. Mathematics
PY  - 2016
SP  - 678
EP  - 701
VL  - 207
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_2016_207_5_a2/
LA  - en
ID  - SM_2016_207_5_a2
ER  -