Mehdizadeh Moghadam, S. M., A. Khosravi, and S. M. Rakhtala Rostami. “Design of a Robust Sliding Mode Controller Based on Nonlinear Modeling of Variable Speed Wind Turbine”. Majlesi Journal of Electrical Engineering, Vol. 11, no. 4, Dec. 2017, pp. 1-9, http://mjee.iaumajlesi.ac.ir/index/index.php/ee/article/view/2316.