M. Badra and T. Takahashi, On the Fattorini criterion for approximate controllability and stabilizability of parabolic systems, ESAIM: Control, Optimisation and Calculus of Variations, vol.20, issue.3, pp.924-956, 2014.
DOI : 10.1051/cocv/2014002

URL : https://hal.archives-ouvertes.fr/hal-00743899

C. Bardos, G. Lebeau, and J. Rauch, Sharp Sufficient Conditions for the Observation, Control, and Stabilization of Waves from the Boundary, SIAM Journal on Control and Optimization, vol.30, issue.5, pp.1024-1065, 1992.
DOI : 10.1137/0330055

F. Boyer and G. Olive, Approximate controllability conditions for some linear 1D parabolic systems with space-dependent coefficients, Mathematical Control and Related Fields, vol.4, issue.3, pp.263-287, 2014.
DOI : 10.3934/mcrf.2014.4.263

URL : https://hal.archives-ouvertes.fr/hal-00848709

N. C??ndeac??ndea and M. Tucsnak, Internal exact observability of a perturbed Euler-Bernoulli equation, Ann. Acad. Rom. Sci. Ser. Math. Appl, vol.2, pp.205-221, 2010.

J. Coron, L. Hu, and G. Olive, Stabilization and controllability of first-order integro-differential hyperbolic equations, Journal of Functional Analysis, vol.271, issue.12, pp.3554-3587, 2016.
DOI : 10.1016/j.jfa.2016.08.018

URL : https://hal.archives-ouvertes.fr/hal-01224012

K. Engel and R. Nagel, One-parameter semigroups for linear evolution equations, Semigroup Forum, vol.63, issue.2, 2000.
DOI : 10.1007/s002330010042

H. O. Fattorini, Some Remarks on Complete Controllability, SIAM Journal on Control, vol.4, issue.4, pp.686-694, 1966.
DOI : 10.1137/0304048

E. Fernández-cara, Q. Lü, and E. Zuazua, Null Controllability of Linear Heat and Wave Equations with Nonlocal Spatial Terms, SIAM Journal on Control and Optimization, vol.54, issue.4, pp.2009-2019, 2016.
DOI : 10.1137/15M1044291

S. Hadd, Unbounded perturbations of C 0 -semigroups on Banach spaces and applications, Semigroup Forum, pp.451-465, 1007.

V. Komornik and P. Loreti, Observability of Compactly Perturbed Systems, Journal of Mathematical Analysis and Applications, vol.243, issue.2, pp.409-428, 2000.
DOI : 10.1006/jmaa.1999.6678

URL : http://doi.org/10.1006/jmaa.1999.6678

I. Lasiecka and R. Triggiani, Global exact controllability of semilinear wave equations by a double compactness/uniqueness argument, Discrete Contin, Dyn. Syst, pp.556-565, 2005.

T. Li and B. Rao, Exact boundary controllability for a coupled system of wave equations with Neumann boundary controls, Chinese Annals of Mathematics, Series B, vol.25, issue.1, pp.473-488, 2017.
DOI : 10.1137/S0363012997331482

M. Mehrenberger, Observability of coupled systems, Acta Mathematica Hungarica, vol.103, issue.4, pp.321-348, 2004.
DOI : 10.1023/B:AMHU.0000028832.47891.09

URL : https://hal.archives-ouvertes.fr/hal-00139351

G. Olive, Boundary approximate controllability of some linear parabolic systems, Evolution Equations and Control Theory, vol.3, issue.1, pp.167-189, 2014.
DOI : 10.3934/eect.2014.3.167

URL : https://hal.archives-ouvertes.fr/hal-00808381

J. Peetre, Another approach to elliptic boundary problems, Communications on Pure and Applied Mathematics, vol.111, issue.4, pp.711-731, 1961.
DOI : 10.5802/aif.111

J. Rauch and M. Taylor, Exponential Decay of Solutions to Hyperbolic Equations in Bounded Domains, Indiana University Mathematics Journal, vol.24, issue.1, pp.79-86, 1974.
DOI : 10.1512/iumj.1975.24.24004

M. Tucsnak and G. Weiss, Observation and control for operator semigroups, Birkhäuser Advanced Texts: Basler Lehrbücher. [Birkhäuser Advanced Texts, pp.978-981, 2009.
DOI : 10.1007/978-3-7643-8994-9

E. Zuazua, Contrôlabilité exacte d'un modèle de plaques vibrantes en un temps arbitrairement petit, C. R. Acad. Sci. Paris Sér. I Math, vol.304, pp.173-176, 1987.

E. Zuazua, Exact boundary controllability for the semilinear wave equation, in Nonlinear partial differential equations and their applicationsColì ege de France Seminar, Pitman Res. Notes Math. Ser., Longman Sci. Tech, vol.220, pp.357-391, 1987.