1. A. Astolfi, L. Praly, Global complete observability and output-to-state stability imply the existence of a globally convergent observer, Proceedings of the 2003 IEEE Conference on Decision Control 2003, Maui, Hawaii, 1562.
2. Online Estimation and Adaptive Control of Bioreactors;Bastin,1990
3. Canonical form observer design for nonlinear time variable systems;Bestle;Internat. J. Control,1983
4. A Luenberger-like observer for nonlinear systems;Ciccarela;Internat. J. Control,1993
5. Nonlinear observer design via an extended observer canonical form;Ding;Systems Control Lett.,1990