Maryam L'Hernault Jean-Pierre Barbot Achour Ouslimani Feasibility of Analog Realization of a Sliding-Mode Observer: Application to Data Transmission. 614-624 2008 55-I IEEE Trans. on Circuits and Systems 2 http://dx.doi.org/10.1109/TCSI.2007.910748 db/journals/tcas/tcasI55.html#LHernaultBO08