%0 Journal Article %A Couchouron, Jean-François %A Ligarius, P. %T Nonlinear observers in reflexive Banach spaces %J ESAIM: Control, Optimisation and Calculus of Variations %D 2003 %P 67-103 %V 9 %I EDP-Sciences %U http://www.numdam.org/articles/10.1051/cocv:2003001/ %R 10.1051/cocv:2003001 %G en %F COCV_2003__9__67_0