C. Bardos et al., SHARP AND SUFFICIENT CONDITION FOR THE EXACT CONTROLLABILITY AND STABILIZATION OF THE ELASTODYNAMIC PROBLEM, Comptes rendus de l'Academie des sciences. Serie 1, Mathematique, 320(10), 1995, pp. 1279-1281
We adapt the Hilbert and Uniqueness Method to the elastodynamic proble
m and we give the sharp and sufficient condition for controllability a
nd stabilisation of this system.