%0 Journal Article
%A A. Yu. Savin
%A K. N. Zhuikov
%T $\eta$-Invariant and index for operators on the real line periodic at infinity
%J Eurasian mathematical journal
%D 2021
%P 57-77
%V 12
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/EMJ_2021_12_3_a6/
%G en
%F EMJ_2021_12_3_a6