A simple observer for nonlinear systems applications to bioreactors, IEEE Transactions on Automatic Control, vol.37, issue.6, pp.875-879, 1992. ,
DOI : 10.1109/9.256352
Stability of Motion, 1967. ,
DOI : 10.1007/978-3-642-50085-5
A theorem on global stabilization, Systems & Control Letters, issue.17, pp.357-362, 1991. ,