%0 Journal Article
%A Ya. M. Dymarskii
%A Yu. A. Evtushenko
%T Foliation of the space of periodic boundary-value problems by hypersurfaces corresponding to fixed lengths of the $n$th spectral lacuna
%J Sbornik. Mathematics
%D 2016
%P 678-701
%V 207
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_2016_207_5_a2/
%G en
%F SM_2016_207_5_a2