%0 Journal Article
%A Borisov, Denis
%A Cardone, Giuseppe
%T Spectra of operator pencils with small 𝒫𝒯-symmetric periodic perturbation
%J ESAIM: Control, Optimisation and Calculus of Variations
%D 2020
%V 26
%I EDP-Sciences
%U http://archive.numdam.org/articles/10.1051/cocv/2019070/
%R 10.1051/cocv/2019070
%G en
%F COCV_2020__26_1_A21_0