%0 Journal Article
%A Thomas Kappeler
%A Yannick Widmer
%T On spectral properties of the $L$ operator in the Lax pair of the sine-Gordon equation
%J Žurnal matematičeskoj fiziki, analiza, geometrii
%D 2018
%P 452-509
%V 14
%I mathdoc
%U http://geodesic.mathdoc.fr/item/JMAG_2018_14_a2/
%G en
%F JMAG_2018_14_a2