Saffarian, A., Sanaye-Pasand, M., P. Ghaleh, A.. “Application of Combinational Adaptive Load Shedding Schemes to Improve Power System Voltage Stability - Part I: General Concept & the Algorithms.” Nashriyyah -i Muhandisi -i Barq va Muhandisi -i Kampyutar -i Iran, vol. 8, no. 1, 2010, pp. 3-12.