1. Immersion of nonlinear systems into linear systems up to output injection: characteristic equation approach, to appear in Int;Back,2004
2. On nonlinear observers with approximately linear error dynamics;Banaszuk,1997
3. New algebro-geometric conditions for the linearization by input-output injection;Glumineau;IEEE Trans. Automat. Contr,1996
4. Observer linearization by output diffeomorphism and output-dependent time-scale transformations;Guay,2001
5. Observer with linear error dynamics for nonlinear multi-output systems;Hou;Systems & Control Letters,1999