%0 Journal Article %A Conrad, Francis %A Pierre, Michel %T Stabilization of second order evolution equations by unbounded nonlinear feedback %J Annales de l'I.H.P. Analyse non linéaire %D 1994 %P 485-515 %V 11 %N 5 %I Gauthier-Villars %G en %F AIHPC_1994__11_5_485_0