Benbouhenni, Habib, Zinelaabidine Boudjema, and Abdelkader Belaidi. 2019. “Using Four-Level NSVM Technique to Improve DVC Control of a DFIG Based Wind Turbine Systems”. Periodica Polytechnica Electrical Engineering and Computer Science 63 (3):144-50. https://doi.org/10.3311/PPee.13636.