1. EDA, Informação Estatística, Electricidade dos Açores, Monthly Information Reports for 2005–2009 (2009). Available on website:
http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&ved=0CEAQFjAC&url=http%3A%2F%2Fpaginas.fe.up.pt%2F~ee02072%2Fdocs%2Fcare_eda_2009_2010_03_31.pdf&ei=cEAmUdCbKIHs8wTDpoHoDw&usg=AFQjCNFLLQgM_37AokB5t9oo3VGPiXeeSw&sig2=r-6tom2CXHRd07B2Dvn88Q&bvm=bv.42661473,d.eWU
2. N. Hatziargyriou, G. Contaxis, M. Papadopoulos, B. Papadias, E. Nogaret, G. Kariniotakis, J.A. Pecas Lopes, M. Matos, J. Halliday, G. Dutton, P. Dokopoulos, A. Bakirtzis, A. Androutsos, J. Stefanakis, A. Gigantidou, Control of isolated power systems with increased wind power generation. Med. Power 98, Lefkosia, Cyprus, 16–18 Nov 1998
3. J. Cardell, M. Ilić, R.D. Tabors, Integrating Small Scale Distributed Generation into a Deregulated Market: Control Strategies and Price Feedback, Laboratory for Electromagnetic and Electronic Systems, Massachusetts Institute of Technology, 1998
4. M. Angelo and P. Lopes, Simultaneous Tuning of Power System Stabilizers Installed in DFIG-Based Wind Generation, Power Tech Proceedings, Lausanne, Switzerland, July 2007