%0 Journal Article
%A Duyckaerts, Thomas
%A Zhang, Xu
%A Zuazua, Enrique
%T On the optimality of the observability inequalities for parabolic and hyperbolic systems with potentials
%J Annales de l'I.H.P. Analyse non linéaire
%D 2008
%P 1-41
%V 25
%N 1
%I Elsevier
%U http://archive.numdam.org/articles/10.1016/j.anihpc.2006.07.005/
%R 10.1016/j.anihpc.2006.07.005
%G en
%F AIHPC_2008__25_1_1_0