1. Stabilization of second order evolution equations by a class of unbounded feedbacks;Ammari;ESAIM Control Optim. Calc. Var.,,2001
2. The zero set of a solution of a parabolic equation;Angenent;J. Reine Angew. Math,1988
3. Controllability for distributed bilinear systems;Ball;SIAM J. Control and Optim.,1982
4. Analysis and Control of Nonlinear Infinite Dimensional System;Barbu,1993
5. Sur l’unicité rétrograde des équations paraboliques et quelques questions voisines;Bardos;Arch. Rat. Mech. Anal.,1973