Mancilla-David, F.; Dominguez-Garcia, J.L.; De Prada, M.; Gomis-Bellmunt, O.; Singh, M.; Muljadi, E. "Modeling and control of Type-2 wind turbines for sub-synchronous resonance damping" Energy Conversion and Management 97, pp. 315 - 322. 2015 DOI: 10.1016/j.enconman.2015.03.069