%0 Journal Article
%A Liu, Hanbing
%A Wang, Gengsheng
%T Second order optimality conditions for periodic optimal control problems governed by semilinear parabolic differential equations
%J ESAIM: Control, Optimisation and Calculus of Variations
%D 2021
%V 27
%I EDP-Sciences
%U https://www.numdam.org/articles/10.1051/cocv/2021028/
%R 10.1051/cocv/2021028
%G en
%F COCV_2021__27_1_A26_0