Raouf, M. , Rouhani, A. , Abedini, M. , Anarmarzi, E. (2013), 'Power System Damping Using Hierarchical Fuzzy Multi- Input PSS and Communication Lines Active Power Deviations Input and SVC ', World Academy of Science, Engineering and Technology, Open Science Index 84, International Journal of Electrical and Computer Engineering, 7(12), 1773 - 1778.