Design of variable structure voltage regulator using pole assignment technique. - M. E. Aggoune; F. Boudjemaa; Ahmed Bensenouci; Abdelhafid Hellal; M. R. Elmesai; Subramanian Vadari (IEEE Trans. Autom. Control., 1994)

New Approach to the Optimization of Power System stabilizers: Genetic Algorithm with Dynamic Constraints. - Abdelghani Choucha; Abdelhafid Hellal; Lakhdar Mokrani; Salem Arif (Control. Intell. Syst., 2012)

Design of a computer code to evaluate the influence of the harmonics in the Transient Stability studies of electrical networks. - Aissa Souli; Abdelhafid Hellal (SSD, 2014)