Controllability and Observability of Linear Discrete-Time Fractional-Order Systems. - Saïd Guermah; Saïd Djennoune; Maamar Bettayeb (Int. J. Appl. Math. Comput. Sci., 2008)

Chaotic synchronisation and secure communication via sliding-mode and impulsive observers. - Hamid Hamiche; Saïd Guermah; Saïd Djennoune; Karim Kemih; Malek Ghanes; Jean-Pierre Barbot (Int. J. Model. Identif. Control., 2013)