%0 Journal Article
%A Mehrenberger, Michel
%A Loreti, Paola
%T An Ingham type proof for a two-grid observability theorem
%J ESAIM: Control, Optimisation and Calculus of Variations
%D 2008
%P 604-631
%V 14
%N 3
%I EDP-Sciences
%U http://www.numdam.org/articles/10.1051/cocv:2007062/
%R 10.1051/cocv:2007062
%G en
%F COCV_2008__14_3_604_0