TY - JOUR AU - Hébrard, Pascal AU - Humbert, Emmanuel TI - The geometrical quantity in damped wave equations on a square JO - ESAIM: Control, Optimisation and Calculus of Variations PY - 2006 SP - 636 EP - 661 VL - 12 IS - 4 PB - EDP-Sciences UR - http://www.numdam.org/articles/10.1051/cocv:2006015/ DO - 10.1051/cocv:2006015 LA - en ID - COCV_2006__12_4_636_0 ER -