De Prada,M.; Mancilla-David,F.; Dominguez-Garcia,J.L.;Muljadi,E.; Singh,M.; Gomis-Bellmunt.; Sumper,A. "Contribution of type-2 wind turbines to sub-synchronous resonance damping" International Journal of Electrical Power and Energy Systems 55, pp. 714 - 722. 2014 DOI: 10.1016/j.ijepes.2013.10.025