Ashfaq, S., A. Arif, A. Shakeel, and T. Mahmood. “REACTIVE POWER CONTROL OF WIND FARM USING FACTS DEVICES”. The Nucleus, vol. 51, no. 2, May 2014, pp. 259-74, http://www.thenucleuspak.org.pk/index.php/Nucleus/article/view/712.