Ashraf, M. M., T. N. Malik, and M. Iqbal. “DEVELOPMENT OF A PROTOTYPE MICRO WIND ENERGY SYSTEM WITH ADJUSTABLE BLADE PITCH FOR EXPERIMENTATION PURPOSES AT LABORATORY LEVEL”. The Nucleus, vol. 51, no. 1, Feb. 2014, pp. 75-86, http://www.thenucleuspak.org.pk/index.php/Nucleus/article/view/724.