TY - JOUR AU - Xu, Cheng-Zhong AU - Sallet, Gauthier TI - Exponential stability and transfer functions of processes governed by symmetric hyperbolic systems JO - ESAIM: Control, Optimisation and Calculus of Variations PY - 2002 SP - 421 EP - 442 VL - 7 PB - EDP-Sciences UR - http://www.numdam.org/articles/10.1051/cocv:2002062/ DO - 10.1051/cocv:2002062 LA - en ID - COCV_2002__7__421_0 ER -