1. Asymptotic analysis and control of a hybrid system composed by two vibrating strings connected by a point mass;Castro;ESAIM: Control Optimization and Calculus of Variations (COCV),1997
2. A hybrid system consisting in two flexible beams connected by a point mass: Spectral analysis and well-posedness in asymmetric spaces;Castro,1997
3. Exact controllability and stabilization of a vibrating string with an interior point mass;Hansen;SIAM J. Cont. Optim.,1995
4. Une remarque sur les séries de Fourier non-harmoniques et son application à la contrôllabilité des cordes avec densité singulière;Castro;C. R. Acad. Sci. Paris, Série I,1996
5. stabilisation et perturbations de systèmes distribués;Lions,1988