1. Banks, H.T., Ito, K.: Approximation in LQR problems for infinite-dimensional systems with unbounded input operators J. Math. Syst. Estim. Control 7(1), 1–34 (1997) (electronic)
2. Boyer, F., Hubert, F., Le Rousseau, J.: Discrete Carleman estimates for elliptic operators and uniform controllability of semi-discretized parabolic equations. J. Math. Pures Appl. (to appear)
3. Cannarsa, P., Martinez, P., Vancostenoble, J.: Carleman estimates for a class of degenerate parabolic operators. SIAM J. Control Optim. 47(1), 1–19 (2008)
4. Collection Mathématiques Appliquées pour la Maîtrise. [Collection of Applied Mathematics for the Master’s Degree];M. Crouzeix,1984
5. Ervedoza, S.: Admissibility and observability for Schrödinger systems: Applications to finite element approximation schemes. Asymptot. Anal. (to appear)