Pontus GrahnViktor BriggnerLinus JohanssonDavood BabazadehLars NordströmCentralized versus distributed state estimation for hybrid AC/HVDC grid.1-62017ISGT Europehttps://doi.org/10.1109/ISGTEurope.2017.8260167conf/isgteurope/2017db/conf/isgteurope/isgteurope2017.html#GrahnBJBNB17