K. K. Busawon and P. Kabore, Disturbance attenuation using proportional integral observers, International Journal of Control, vol.74, issue.6, pp.618-627, 2001.
DOI : 10.1080/00207170010025249

D. Chu and V. Mehrmann, Disturbance decoupled observer design for descriptor systems, Systems & Control Letters, vol.38, issue.1, pp.37-48, 1999.
DOI : 10.1016/S0167-6911(99)00045-6

M. Chilali and P. Gahinet, H/sub ???/ design with pole placement constraints: an LMI approach, IEEE Transactions on Automatic Control, vol.41, issue.3, pp.358-367, 1996.
DOI : 10.1109/9.486637

L. Dai, Impulsive modes and causality in singular systems, Singular Control Systems, pp.1267-1281, 1989.
DOI : 10.1109/TAC.1981.1102699

M. Darouach, M. Zasadzinski, and S. J. Xu, Full-order observers for linear systems with unknown inputs, IEEE Transactions on Automatic Control, vol.39, issue.3, pp.606-609, 1994.
DOI : 10.1109/9.280770

URL : https://hal.archives-ouvertes.fr/hal-00098125

M. Darouach, M. Zasadzinski, and M. Hayar, Reduced-order observer design for descriptor systems with unknown inputs, IEEE Transactions on Automatic Control, vol.41, issue.7
DOI : 10.1109/9.508918

URL : https://hal.archives-ouvertes.fr/hal-00098122

I. A. Hiskens and A. Koeman, Parameter estimation from power system disturbance measurements, Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137), pp.667-672, 1998.
DOI : 10.1109/EMPD.1998.702768

M. Hou and P. C. Müller, Observer for linear descriptor systems with unknown input, Automatisierungstechnik, vol.4010, issue.6, pp.220-227, 1992.

D. Koenig and S. Mammar, Design of proportional-integral observer for unknown input descriptor systems, IEEE Transactions on Automatic Control, vol.47, issue.12, pp.2057-2062, 2002.
DOI : 10.1109/TAC.2002.805675

URL : https://hal.archives-ouvertes.fr/hal-00153817

H. H. Niemann, J. Stoustrup, B. Shafai, and S. Beale, LTR design of proportional-integral observers, International Journal of Robust and Nonlinear Control, vol.35, issue.7, pp.671-693, 1995.
DOI : 10.1002/rnc.4590050706

B. Schafai, C. T. Pi, S. Nork, and S. P. Linder, Proportional integral adaptive observer for parameter and disturbance estimations, Proceedings of the 41st IEEE Conference on Decision and Control, 2002., pp.4694-4699, 2002.
DOI : 10.1109/CDC.2002.1185119

H. H. Niemann, J. Stoustrup, and B. Shafai, Fault detection using PI observers, Proc. Control, pp.604-609, 1997.

M. Ilic and J. Zaborszky, Dynamics and Control of Large Electric Power Sytems, 2000.