Delay-dependent robust stability criteria for singular time-delay systems by delay-partitioning approach. - Ahmed Ech-charqy; Mohamed Ouahi; El Houssaine Tissir (Int. J. Syst. Sci., 2018)

On the Design of Functional Observers for Multi-Delayed Linear Systems. - Ghali Naami; Mohamed Ouahi; El Houssaine Tissir; Abdelhamid Rabhi; Ahmed Ech-Charqy (ICSC, 2021)

Functional Observers Design for Linear Systems with Non-commensurate Time Varying Delays. - Ghali Naami; Mohamed Ouahi; El Houssaine Tissir; Abdelhamid Rabhi; Ahmed Ech-charqy (Circuits Syst. Signal Process., 2021)